Obama Cheered by Troops in Afghanistan

May 1, 2012 Updated: October 1, 2015
President Barack Obama greets troops during a visit to Bagram Airfield
President Barack Obama greets troops during a visit to Bagram Airfield yesterday in Afghanistan. Obama signed a U.S.-Afghanistan strategic partnership agreement during his unannounced visit to the country. (Mandel Negan/AFP/GettyImages)