Defense Secretary Leon Panetta performs a swear-in ceremony to reenlist four troops during his visit to Incirlik Air Base, Turkey, on Dec. 14, 2012. Panetta is heading home after spending three days in Afghanistan meeting with troops, commanders and Afghani leaders. (Associated Press)

Photo by: Susan Walsh

Defense Secretary Leon Panetta performs a swear-in ceremony to reenlist four troops during his visit to Incirlik Air Base, Turkey, on Dec. 14, 2012. Panetta is heading home after spending three days in Afghanistan meeting with troops, commanders and Afghani leaders. (Associated Press)