During social hour at the Year of the B-2 Gala at Whiteman Air Force Base, Mo., Sept. 28, 2013, a rainbow appeared over the "Spirit of Missouri." The gala celebrated the 20th anniversary of the B-2 Spirit Stealth Bomber, which made its first landing at Whiteman 17 Dec., 1993. (U.S. Air Force photo by Master Sgt. Matthew S. Osborn/Released)