U.S. Air Force Gen. Darren W. McDew passes the U.S. Transportation Command guidon to U.S. Army Gen. Stephen R. Lyons during a change of command ceremony held Aug. 24, 2018, at Scott Air Force Base, Illinois. The passing of a guidon serves as a visual symbol of a change of command. Lyons is the first Army officer to head USTRANSCOM. He leads an enterprise of more than 144,000 logistics and transportation professionals. U.S. Secretary of Defense James N. Mattis presided over the ceremony. (U.S. Air Force photo by Staff Sgt. Oz Suguitan)