An aerial view of Kabul near Hamid Karzai International Airport
An aerial view of Kabul near Hamid Karzai International Airport February 22, 2015. The United States is considering slowing a planned withdrawal of U.S. troops from Afghanistan to ensure that "progress sticks" after more than a decade of war, Carter said during an unannounced visit to Kabul on Saturday. REUTERS/Jonathan Ernst (AFGHANISTAN - Tags: POLITICS MILITARY)