At Attention Defense Secretary James N. Mattis and British Defense Secretary Gavin Williamson stand at attention during a Marine Corps parade at the Lincoln Memorial in Washington, D.C., Aug. 7, 2018. DoD photo by Tech. Sgt. Vernon Young Jr. SHARE IMAGE: Download Image: Full Size (3.17 MB) Tags: James N. Mattis, SecDef Photo By: Tech. Sgt. Vernon Young Jr. VIRIN: 180807-D-XT155-002.JPG Photo Gallery