Maj. Gen. Mark Toy, U.S. Army Corps of Engineers Great Lakes and Ohio River Division commander, presents the Secretary of Defense Medal for the Defense of Freedom April 8, 2019 to Billy Johnson, recognizing the severe injuries he sustained while supporting a Corps of Engineers mission as a security officer in Iraq Dec. 9, 2007. The general presented the medal on behalf of Secretary of the Army Mark T. Esper during a ceremony held at the Tennessee Valley Authority Central Labs near Chickamauga Lock in Chattanooga, Tenn.