The 509th Operations Group (509 OG) is the flying component of the United States Air Force 509th Bomb Wing (509 BW), assigned to Whiteman Air Force Base, Missouri. It is equipped with all 20 of the USAF's B-2 Spirit stealth bombers, flown by its 393rd Bomb Squadron. Its 13th Bomb Squadron, the training unit for the 509th, provides training in T-38 Talon trainers as well as in the 393rd's B-2 Spirits. The 509 OG traces its history to the World War II 509th Composite Group (509 CG), which conducted the atomic bombings of Hiroshima and Nagasaki, Japan, in August 1945. Redesignated the 509th Bombardment Group, Very Heavy in 1946, the group was one of the original ten bombardment groups of Strategic Air Command. The unit was also the host organization at Roswell Army Airfield, New Mexico in July 1947 during the alleged Roswell incident. The 509th Bombardment Group was inactivated in 1952. In 1993, the unit was reactivated as the 509 OG, as part of the Objective Wing organization implementation of the 509th Bomb Wing. Units The 509th OG consists of three component squadrons: 13th Bomb Squadron Originally activated as the 325th Bomb Squadron on 6 January 1998. Re-designated the 13th BS ("Grim Reapers") on 23 September 2005, when that unit, flying B-1 Lancers as part of the 7th Operations Group, was inactivated. As the Formal Training Unit, the 13th BS provides Initial Qualification, Requalification, and Flight Instructor Candidate B-2 Training. Additionally, it manages the T-38 Companion Trainer Program and three Weapons Systems Trainers (flight simulators). 393rd Bomb Squadron The 393rd BS ("Tigers"), a traditional squadron of the 509th, was activated as a B-2 squadron on 27 August 1993. It is the USAF's only operational bomb squadron. 509th Operations Support Squadron A non-flying squadron, the 509th OSS ("Hawks") controls all airfield activities at Whiteman. Unofficial insignia In addition to its official insignia, during B-2 stealth bomber test flights, some members of the 509th Bomb Wing procured an unofficial insignia involving an alien, the legend To Serve Man (referring to a famous Twilight Zone episode), and the inscription Gustatus Similis Pullus (Dog Latin for "Tastes like chicken"). A second variation carried the term "Classified Test Flight" instead of the Twilight Zone reference, and both harkened to the 509th's connection to the "Roswell incident". History The historical roots of the 509th OG begin on 17 December 1944 when the 509th Composite Group