Became its own branch under the National Security Act of 1947
[DOC] [TLE] Chp 2, Part I: Understanding The Secret Team in the Post-World War ... [PAR] Prouty: It's very important while discussing the National Security Act of 1947 to be 
... created the National Intelligence Group and placed it under General 
Vandenberg, ... to share their aviation interests with a new branch of the service: 
the Air Force.