The 13th Bomb Squadron (13 BS) is a squadron of the United States Air Force. It is assigned to the 509th Operations Group, Air Force Global Strike Command, stationed at Whiteman Air Force Base, Missouri. The squadron is equipped with the B-2 Spirit Stealth Bomber. Re-organized in 1921 as part of the permanent United States Army Air Service, the squadron became part of Fifth Air Force in the Pacific Theater of Operations (PTO) of World War II flying B-25 Mitchell medium bombers. During the Cold War, it fought in the Korean War and Vietnam War as a B-57 Canberra tactical bomber squadron.