Should the Afghan government sign a security agreement, the U.S. plans to keep between 6,000 and 9,000 American troops in Afghanistan even after the U.S. and NATO's combat mission officially ends late in 2014.
Beginning in 2015, the remaining troops would train Afghan soldiers and mount operations against any remnants of al-Qaida.
But they wouldn't be the only ones who stay behind: U.S. troops would almost certainly be outnumbered by civilian contractors.
Steve Swallow started playing jazz as a teenager. While a student at Yale University, he played mostly in with Dixieland bands. And then the 20-year-old bassist got a gig with the avant-garde-leaning pianist Paul Bley at a nearby college, went home, went to bed — and dropped out.
Think back to an important event in your life: a graduation, a birth, a special Thanksgiving dinner. Chances are you're remembering not only what happened, but also where it happened. And now scientists think they know why.
As we form so-called episodic memories, the brain appears to be using special cells in the hippocampus to "geotag" each event, researchers report in Science. The process is similar to what some digital cameras do when they tag each picture with information about where the image was taken.