Portrait of Gunnery Sgt. Thomas Sullivan, left, Staff Sgt. David Wyatt, Sgt. Carson Holmquist, Petty Officer 2nd Class Randall Smith, and Lance Cpl. Squire Wells sit on the stage of a memorial service in their honor in Chattanooga, Tenn, Aug. 15, 2015. The five service members were killed on July 16, 2016.