Mattis Remarks Defense Secretary Jim Mattis speaks to members of the U.S. Strategic Command during his visit to Offutt Air Force Base, Neb., Sept. 14, 2017. DoD photo by Air Force Staff Sgt. Jette Carr SHARE IMAGE: Download Image: Full Size (2.13 MB) Photo By: Jette Carr VIRIN: 170914-D-GY869-040L.JPG Photo Gallery