MISSION DISCUSSION U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, discusses the KC-135 Stratotanker refueling mission with leaders from Regional Command North in Mazar-i-Sharif, Afghanistan, July 21, 2013. Dempsey also met with U.S. and allied troops. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 530476-N-SXV87-338.jpg Photo Gallery