The 11th Bomb Squadron (11 BS) is a unit of the United States Air Force 2d Operations Group located at Barksdale Air Force Base, Louisiana. The 11th is equipped with the B-52H Stratofortress. The 11 BS is one of the oldest units in the United States Air Force, first being organized as the 11th Aero Squadron on 26 June 1917 at Kelly Field, Texas. The squadron deployed to France and fought on the Western Front during World War I as a Day Bombardment squadron. It took part in the St. Mihiel offensive and Meuse-Argonne offensive.