Jack Marcelain (center), along with his friends and family share a moment as they watch a military working dog demonstration by the 7th Security Forces August 1. Jack was diagnosed with a tumor at the base of his brain stem in April 2005. His family and friends participated in the Pilot For a Day program, which allows childeran with serious medical conditions to experience what its like to be in the Air Force. (U.S. Air Force photo by Senior Airman Domonique Simmons)