Barack Obama vows to let Afghans take over from spring
US president and Karzai agree on deal that transfers security responsibilities by spring

The US president, Barack Obama, has promised to speed up a transfer of lead security responsibility from Nato to Afghan forces in spring, in a sign that US troops may withdraw faster.
Nato forces would have a "very limited" role in the country after 2014, Obama said.
He insisted that Washington had achieved its prime goal of "decapitating" al-Qaeda.
Obama met Afghan President Hamid Karzai on Friday at a crucial moment in the final chapter of a long, bloody war, and as Obama balances the future security of Afghanistan with US combat fatigue and a desire to spend America's dwindling resources at home.
"Starting this spring, our troops will have a different mission - training, advising, assisting Afghan forces," he said.
"It will be a historic moment and another step towards full Afghan sovereignty."