Happy Birthday United States Air Force September 18

"Initially part of the United States Army, the USAF was formed as a separate branch of the military on 18 September 1947 under the National Security Act of 1947.^[1] It is the most recent branch of the U.S. military to be formed, and is the largest and most technologically advanced air force in the world."

http://en.wikipedia.org/wiki/United_States_Air_Force

See video at

http://www.youtube.com/watch?v=FsN9ZQkSpHw