A U.S. Army paratrooper gives a thumbs up while participating in a personnel drop at Fort Bragg, N.C., Oct. 11, 2012, during Joint Operational Access Exercise (JOAX) 13-01.
A JOAX is designed to enhance service cohesiveness between U.S. Army and Air Force personnel, allowing both services an opportunity to properly execute large-scale heavy equipment and troop movement. (DoD photo by Staff Sgt. Elizabeth Rissmiller, U.S. Air Force/Released). Original public domain image from Flickr