Walk and Talk Defense Secretary Jim Mattis, third from left, and NATO Secretary General Jens Stoltenberg walk to a meeting with deployed forces in Afghanistan, Sept. 27, 2017. DoD photo by Air Force Staff Sgt. Jette Carr SHARE IMAGE: Download Image: Full Size (0.43 MB) Photo By: Staff Sgt. Jette Carr VIRIN: 170927-D-GY869-0887.JPG Photo Gallery