Iranian President Hassan Rouhani at the U.N. on Tuesday. Ray Stubblebine /Reuters/Landov hide caption

itoggle caption Ray Stubblebine /Reuters/Landov

At a road project in Qalat, Afghanistan, last summer, U.S. forces were providing security. U.S. Air Force Staff Sgt.Brian Ferguson /Reuters /Landov hide caption

itoggle caption U.S. Air Force Staff Sgt.Brian Ferguson /Reuters /Landov

Officials and mourners prepare to place the coffin of Afghanistan High Peace Council and former Taliban leader Arsala Rahmani in a grave earlier today, in Kabul. Massoud Hossaini /AFP/Getty Images hide caption

itoggle caption Massoud Hossaini /AFP/Getty Images