Col. Sharon Bannister, 79th Medical Wing commander, introduces the guest speaker for a Black History Month event at Joint Base Andrews, Md., Feb. 10, 2017. The guest, Maj. Gen Roosevelt Allen, Office of the Surgeon General medical operations, research director and chief of the dental corps, spoke about the importance of Black History Month. (U.S. Air Force photo by Airman 1st Class Valentina Lopez)