The Thunderbird Diamond formation performs the Bottom-Up Pass during an air show performance in Titusville, Fla., March 25, 2013.The commander of Air Combat Command, Gen. Mike Hostage III, has officially selected the officers who will be joining the United States Air Force Thunderbirds for the 2014 demonstration season. (U.S. Air Force photo byTech. Sgt. Manuel J. Martinez/Released)