KABUL, AFGHANISTAN - FEBRUARY 21:  Afghan President Ashraf Ghani addresses a new conference with U.S. Secretary of Defense Ash Carter (not pictured) at the Presidential Palace on February 21, 2015 in Kabul, Afghanistan. Carter is making his first trip to visit troops and commanders in Afghanistan since he was sworn in. He will also meet with Afghan President Ashraf Ghani.  (Photo by Jonathan Ernst-Pool/Getty Images)