U.S. Secretary of Defense Ash Carter (L, on stairs) deplanes as he is greeted by U.S. Army General John Campbell (R) upon his arrival at Hamid Karzai International Airport in Kabul, Afghanistan February 21, 2015. Carter arrived in Afghanistan on Saturday on his first trip since taking over the job this week, saying he wanted to talk to Afghan and American officials to ensure a "lasting" success as U.S. troops withdraw. REUTERS/Jonathan Ernst (AFGHANISTAN - Tags: POLITICS MILITARY TRANSPORT)