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Powered by Guardian.co.ukThis article titled “Oklahoma rescuers comb wreckage for survivors in wake of savage tornado” was written by Paul Harris, for guardian.co.uk on Tuesday 21st May 2013 16.30 UTC

Rescue workers continued to search for survivors amid scenes of devastation on Tuesday after a suburb of Oklahoma City was hit by one of the most powerful tornadoes in modern US history.

Hundreds of US National Guard, police and medical staff combed through piles of rubble in the streets of Moore, south of the city, a landscape that had been transformed in a matter of minutes from leafy suburbia to an apocalyptic scene.

The tornado lasted about an hour on Monday, when it tore through farmland outside Oklahoma City, crossed a river and then headed into Moore. It destroyed hundreds of homes and shops, wiped out two schools and a hospital and left more than 240 people injured, including at least 60 children.

Authorities in Moore put the number of deaths at 24, revising down an earlier figure of 51. Local officials blamed the higher figure on double-counting in the confusion of the tornado strike. But they also warned that the new figure could climb again as more bodies were found. “We have got good news. The number right now is 24. There was a lot of chaos,” said Amy Elliott, the chief administrative officer for the local medical examiner.

Rescue workers had spent Monday night searching for survivors in Moore and elsewhere along the tornado’s track. They deployed thermal imaging equipment to try and detect body heat beneath the rubble and also asked media crews to leave the area so rescuers could better listen to any cries for help.

Using flashlights and teams of sniffer dogs, they braved conditions made hazardous by leaking gas mains, fires and the threat of further storms. But local authorities said more than 100 people had been pulled alive from the ruins after the tornado struck.

Television footage showed block after block of flattened homes, and trees splintered into match sticks. Video emerged showing screaming and bloodied children carried by teachers and parents from the wreckage of their school.

On Tuesday, President Obama called the disaster “one of the most destructive tornadoes in history” and promised the full help of the government in both rescue and rebuilding. “There are empty spaces where there used to be living rooms and bedrooms and classrooms. And in time we’re going to need to refill those spaces with love and laughter and community,” he said.

Obama summed up the horror of the moment for many Americans by talking about the direct strikes on Moore’s schools. “In an instant, many homes were destroyed, dozens of people lost their lives … and among them were children trying to take shelter in the safest place they knew, their school,” Obama said.

The tornado touched down at 2.56pm, just 16 minutes after the first warning went out, and traveled for 20 miles. The National Weather Service said the tornado was at least a half-mile wide and was an EF-4 on the enhanced Fujita scale, the second most-powerful type of tornado. It loosely followed the path of a previous storm that hit the same region in May 1999 with winds of up to 300 mph.

The Moore storm was the deadliest US tornado since 161 people were killed in Joplin, Missouri, two years ago.

Stories of survival began to emerge on Monday. At the hospital in Moore, some doctors had jumped in a freezer to survive the storm. Elsewhere local farmer Lando Hite described how the storm had struck a horse farm carrying the animals up into the sky. “It was just like the movie Twister,” Hite told TV station KFOR. “There were horses and stuff flying around everywhere.”

Outside the regional hospital in nearby Norman, Oklahoma, Ninia Lay, 48, told Reuters she huddled in a closet as the tornado hit. Her house was flattened and Lay was buried in the rubble for two hours until her husband and rescuers dug her out. “I thank God for my cell phone. I called me husband for help,” she said. At the Agapeland daycare facility, 15 children survived after being herded into two bathrooms. Even though the roof was ripped off one of the rooms as the tornado passed, staff kept the youngsters calm by having them sing: “You are my sunshine.” All survived.

But there were scenes of tragedy. At local churches, families anxiously awaited news of loved ones as authorities scrambled to work out who was dead, missing or alive. At one church, St Andrews United Methodist Church, the names of surviving children were called out via megaphone in front of a crowd of terrified parents.

Much of the attention was focused on the ruins of Plaza elementary school, which had been flattened by the storm. Workers formed lines to remove rubble from the twisted heap which had had its roof torn off and its walls pushed down by the sheer force of the winds. A few children were found alive in the rubble overnight and were passed down a line of rescue workers to waiting ambulances. But as the search wore on, it became less likely that anyone would be pulled out alive. “They’re looking for life, but they have not had any hits recently, so they’re in recovery mode now,” Oklahoma governor Mary Fallin said late Monday night.

The weather system that spawned the tornado, and several other twisters the day before, had still not run out of steam by Tuesday. South-west Arkansas and north-east Texas, including Dallas, were still under the threat of severe weather warnings, raising the dread prospect that yet more tornadoes could still strike the area and wreak further havoc.

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Powered by Guardian.co.ukThis article titled “Electric shocks to brain help students solve maths problems, scientists say” was written by Ian Sample, science correspondent, for The Guardian on Thursday 16th May 2013 17.06 UTC

People who struggle with maths problems might fare better after a course of gentle electric shocks to the brain, scientists have claimed.

Psychologists at Oxford University found that students scored higher on mental arithmetic tasks after a five-day course of brain stimulation.

If future studies prove that it works – and is safe – the cheap and non-invasive procedure might be used routinely to boost the cognitive power of those who fall behind in maths, the scientists said. Researchers led by Roi Cohen Kadosh zapped students’ brains with a technique called transcranial random noise stimulation (TRNS) while they performed simple calculations, or tried to remember mathematical facts by rote learning.

In the study published in Current Biology, 25 students had electrical pulses fired across their brains, while 26 others had a sham treatment, in which they thought they had brain stimulation, but the equipment was turned off.

In tests afterwards, the students who had their brains stimulated solved maths puzzles 27% faster than the control group, suggesting that their brains were working more efficiently.

“Our aim is to help those with poor numeracy, which is approximately 20% of the population,” Cohen Kadosh told the Guardian. “But we need to extend the results to the general population, and use more ecological settings, such as classrooms. There is of course more work to be done, but it is a promising direction.”

Cohen Kadosh said the improvement lasted for six months after the course of stimulation, but other scientists were dubious about the claim. The result was based on six students who received stimulation, and six controls, who returned to the lab six months later.

“The work is technically impressive and an elegant illustration of how brain stimulation can have immediate benefits for learning that are linked to changes in brain physiology,” said Chris Chambers, a psychologist at Cardiff University.

“At the same time, I’m sceptical about the conclusion that TRNS boosted maths ability even six months after it was applied. The claim is based on a very small sample and a one-tailed statistical analysis that would have been non-significant using a standard test.

“My worry is that the six-month effect, as intriguing as it appears, could be a false discovery. I would love to see this effect replicated in a sample that is larger and well-powered, because if true it could have important implications for basic neuroscience and the treatment of various clinical conditions. But until such data appears, the six-month claim remains weak in my view.”

Jon Simons, a neuroscientist at Cambridge University, had similar concerns, adding that only six students who had TRNS were assessed six months later. “The findings here seem weaker to me,” he said.

Amanda Ellison, who studies brain stimulation for rehabilitating patients at Durham University, said the procedure still looked promising.

“The next issue will be understanding the mechanism of this effect so that the technique can be applied to more functions. However, the impact for neuro-rehabilitation for example is hopeful,” she said.

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Powered by Guardian.co.ukThis article titled “All sides in Syria have weapons ‘except the good guys’, says British official” was written by Matthew Weaver, for The Guardian on Wednesday 15th May 2013 18.15 UTC

All sides in the Syrian conflict have access to weapons “except the good guys,” according to the official in charge of handling Britain’s response to the crisis in Syria.

Reza Afshar, head of the Syria team at the foreign office, publicly revealed for the first time how important weapons had become to Britain’s private bargaining with the Syrian opposition. Afshar suggested the opposition had insisted on getting access to arms before they agree to enter talks with the Assad regime.

Speaking at a meeting in the Commons, he said: “We are trying to get the opposition to get involved in a negotiation with people they really don’t want to negotiate with. The political reality is that in order to get them to the table we need to amend the arms embargo. It is that simple. They need an incentive.”

Afshar defended Britain’s attempts to lift an EU arms embargo against Syria by claiming that the current restrictions were pushing Syria towards extremism. On Tuesday a video showing a rebel commander apparently biting the heart or lung of a dead government soldier raised more doubts about western backing of the Syrian opposition.

Afshar suggested that arms could be delivered to groups vetted against extremism and such abuses. “Everyone is getting arms except the good guys … It means that people are becoming more and more radicalised,” he said.

“Those people who are on the extreme end of the spectrum are winning out. They are able to provide security and services in areas where there is a vacuum. And the good guys can’t. It is making the situation worse. I’m not saying that the answer to that is necessarily throwing a bunch of arms in there, but I am saying it is not as simple as saying, ‘You don’t want to add fuel to the fire.’”

Afshar was addressing a Commons briefing on the humanitarian crisis in Syria hosted by Islamic Relief and the Council for Arab-British Understanding. Oxfam’s Richard Stanforth said the relief agency was concerned that providing more arms to Syriawould worsen the humanitarian crisis and lead to more human rights abuses.

Responding to those concerns, Afshar said: “Why is it that the opposition want us to amend the embargo? It is so they feel that there is another alternative out there. So that maybe they can sit at the table knowing that they have some more levers.

“You have to look at the context around you and use those levers and press those buttons. It doesn’t sound nice, and you may not like it, but that’s the reality.

British and French attempts to lift the embargo have prompted a fierce debate within the EU. said arming the Syrian opposition would violate international law.

Afshar, who was previously head of the UK mission to the UN in the run-up to military intervention in Libya, also revealed the frustration among diplomats with Russia over Syria.

He said it was disingenuous of Russia to cite events in Libya as an excuse for inaction in Syria.

Afshar said: “Our aim is to galvanise the international community into finding a solution to the Syria crisis. That has eluded us until now because the international system broke down after Libya completely.

“We did what we did in Libya and we acted very fast and decisively. Post Libya we tried to move very quickly with an international response to the Syria crisis and it broke down – and the Russians won’t hide from the way they feel about this – because they wanted to insist that we never do what we did again in Libya.

“They created this sense that they somehow had the wool pulled over their eyes. I was there just before we all voted on Libya and I can tell you for a fact that we all explained precisely what was involved when we passed that resolution and the military action that would come after that. Everyone involved, including the Russians, knew full well what they were getting into. But they have used that since as a kind of geopolitical tool.

“Unfortunately that has meant that Syria has suffered as a result. The question since then has been how do you still influence the crisis when the international tools that you would usually use are broken? That’s what we are all struggling with.”

However, Afshar suggested a US-Russian deal to host an international conference on Syria could represent a turning point.

“In the last two weeks we have made a mini breakthrough,” he said, “but I wouldn’t suggest it is going to be the answer. It is going to be a long difficult process that is going to take a lot of effort.”

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Powered by Guardian.co.ukThis article titled “OJ Simpson testifies in attempt to free himself from armed robbery sentence” was written by Ed Pilkington in New York, for guardian.co.uk on Wednesday 15th May 2013 18.11 UTC

OJ Simpson, the NFL star and Hollywood actor who was infamously acquitted of murdering his former wife and her friend 18 years ago, testified in a criminal case for the first time on Wednesday, in an attempt to free himself from jail on unrelated charges.

Simpson was brought into a courtroom in Las Vegas dressed in a dark blue prison jumpsuit and shackled by hand and ankle. He was giving evidence in his own defence in an attempt to overturn the nine- to 33-year sentence he is serving for a 2007 armed robbery and kidnapping, and gain a retrial. Simpson was found guilty of leading a group of armed men into the Palace Station hotel in Las Vegas and stealing sports memorabilia from a hotel room.

Grey haired and stocky, Simpson, 65, presented his actions as an innocent attempt to retrieve items that belonged to him – watches and rings he had been given upon retirement, footballs signed by other stars or kept at the end of significant games, and family photographs.

“I knew I had a lot of things missing,” he said. “It was pictures, a photo album of my mother that really got my attention.” All he wanted, he said, was to get the items back. “They belonged to my kids. I wanted them to have them.”

Simpson gave evidence in a 1997 civil trial in which he was ordered to pay $33.5m in damages for the wrongful death of Nicole Brown and Ronald Goldman, but he has never before testified in a criminal case. Legal experts have indicated that his attempt to get a retrial is a common procedure, but one that rarely succeeds in the US.

In his testimony, Simpson tried to lay blame for his conviction on bad legal advice from his then lawyer, Yale Galanter. He said that he had discussed the plan to recover the missing items with Galanter just a day before the raid happened and that Galanter had approved. Simpson said Galanter had advised him that he could use some force and physically detain the men holding his possessions until the police arrived.

“The overall advice he game me was you have the right to get your stuff,” he said. “He used the example if you walk down a street and see your laptop in the front seat of a car, you can break the car window to retrieve the laptop.”

But Galanter advised him that he must not commit trespass, Simpson said.

Under examination by his defence attorney, Simpson said that no discussion of force had taken place in devising the plan. “If they didn’t give you the stuff then you have to call the police,” he said, “that’s what I told everybody involved.”

Were weapons discussed, Simpson was asked. “No weapons,” he said, “there was never any discussion of any weapons.”

The hearing was the latest effort by Simpson to foreshorten his sentence. In 2010, the Nevada supreme court refused to throw out the conviction on grounds that his trial was tainted by the infamy of his acquittal in the Brown-Goldman murder case. Should he lose this latest attempt to gain a retrial, he will be eligible for parole, at the earliest, in five years’ time.

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Powered by Guardian.co.ukThis article titled “Live G8 debate, Andrew Mitchell and gender equality” was written by Liz Ford, for guardian.co.uk on Tuesday 14th May 2013 15.59 UTC

G8 leaders gather in Northern Ireland next month for their annual summit, hosted in the UK for the first time in eight years. What has been achieved since 2005? How have the priorities changed? And what is at stake for developing countries this time round?

We’ll be discussing these issues in our podcast, which we’re recording in front of a live audience on Wednesday 15 May. The debate will be chaired by the Guardian’s Hugh Muir, who will be joined by Guardian economics editor Larry Elliott, chief executive of Save the Children UK Justin Forsyth, co-ordinator of the Trade Justice Movement Ruth Bergan, and executive director of advocacy group ONE Jamie Drummond.

The recording will take place at the Guardian at Kings Place, 90 York Way, London N1 9GU. Register your attendance and submit a question for the panel using this Google form.

Elsewhere on the site

Naila Kabeer and Jessica Woodroffe argue why a standalone gender equality goal is needed in any new development targets, rather than a general inequality goal.

Britain’s former development secretary, Andrew Mitchell, defends his actions over Rwanda, the government’s U-turn on legislating to spend 0.7% of GNI on aid and the end of its bilateral programme to South Africa.

Celeste Hicks speaks to Denise Brown, the new regional co-ordinator of the World Food Programme in the Sahel, who explains why a joined-up approach is needed to stem crises in this part of Africa.

Modern-day slavery in focus

Rachel Williams reports on Nepal’s struggle to contain human trafficking.

Guardian’s development journalism competition

Due to a technical fault with the entry system, the deadline for the competition has been extended until Wednesday. Visit the website for details.

Multimedia

Our latest galleries include:

Humanitarian intent: Urgent Architecture from ecohomes to shelters

Conflict, natural disasters, climate change, population growth, urbanisation and poverty all demand that people think differently about housing and shelter. Urgent Architecture looks at sustainable solutions.

Educating Burma’s migrant children

Migration from Burma to Thailand is increasing, with new arrivals often taking up dangerous and difficult jobs. These working conditions have a direct impact on children.

Coming up

We film Hans Rosling demonstrating the impact of population growth on wealth distribution and carbon emissions.

Tamasin Ford reports from Ivory Coast on the challenges the country faces following election violence in 2010-11.

To coincide with this week’s conference on Mali, Alex Duval Smith speaks to internally displaced women and children in Segou, in the south, who are reliant on aid agencies.

Mark Tran visits youth programmes and agricultural projects in Karamoja, Uganda.

Professionals network

The Global Development Professionals Network is dedicated to people working in development. Focusing on practice and people, the network shares knowledge and challenges some of the thinking and doing of development. If you’d like to contribute, read the guidelines for writers and email ideas to globaldevpros@guardian.co.uk.

What you said: some of the best reader comments

Commenting on Stephen’s Chan’s new book, which looks at how China is educating Africa, momoyama wrote:

The Chinese are in my country (the Bahamas) and investing in droves. So far I have heard no local complaint. I find it odd that suddenly the interest of China in Africa so horrifies western media and elites, when nobody seems to think to ask the Africans what they think!

DeanMoull said:

Only time will tell if the Chinese “investment” and influence will prove to be beneficial [and benign?] but for now it’s certainly refreshing to see a new energy and perspective in development.

On Annie Kelly’s blog on a mobile app that aims to cut motorcycle deaths in Kenya, LeoHesse said:

Good idea and nice to see technology being used creatively, but a) how many borda-borda drivers will be able to afford to buy & maintain an Android phone post-trial period; and b) how battery friendly will the app be?

The manager of the project, elfirezo, responded:

The adoption of smart phones in Africa is increasing. As the wealthier segment of the population increases they will upgrade to new phones leading to an increase in cheap secondhand smart phones as the wealthier dispose of their old ones.

In our poll on the British government’s failure to legislate for spending 0.7% of GNI on aid, ipeanddevelopment wrote:

How significant is it? It is a champagne popping target for donors and only marginal for development.

The results of the poll showed that 64% of you thought legislation mattered, 30% thought it didn’t and 5% were undecided.

Highlights from the blogosphere

Why don’t Kenyans save more? Wolfgang Fengler and Borko Handjiski ask on the Africa Can End Poverty blog. A neglected infrastructure is just one reason, they argue, but can households, companies and the government be persuaded to put money aside?

Global Voices discusses a leaked document that allegedly outlines Japan, Brazil and Mozambique’s plans to grab land.

And finally …

Poverty matters will return in two weeks with another roundup of the latest news and comment. In the meantime, keep up to date on the Global development website. Follow @gdndevelopment and the team – @MaeveShearlaw, @ClaireProvost, @LizFordGuardian and @MarkTran – on Twitter, and join Guardian Global development on Facebook.

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