Exactly one year after Osama bin Laden was killed, president Obama made a brief surprise visit to Afghanistan tonight and gave a speech from the Bagram air base in Kabul about the future strategic cooperation between America and Afghanistan.

The accord deals with future cooperation between the United States and Afghanistan after US troops leave that country in 2014. The accord was signed by Obama and Afghan president Hamid Karzai.

Here is a New York Times story from Kabul about the visit.