Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, speaks to Army Gen. John W. Nicholson Jr., commander of Resolute Support Mission and U.S. Forces Afghanistan, aboard a UH-60 Blackhawk helicopter before visiting Train Advise Assist Command - North in Mazar-e-Sharif, Afghanistan March 20, 2018. The senior leaders discussed the current security environment in Afghanistan, the progress of the Afghan National Defense and Security Forces and the re-posturing of U.S. forces as part of the new South Asia strategy. DoD photo by Navy Petty Officer 1st Class Dominique A. Pineiro