Airmen sing a series of popular songs from the 1990’s during the Tops in Blue tour June 18, 2014 at Joint Base Lewis-McChord, Wash. Tops in Blue has traveled more than four million miles to military bases throughout the world, performed at six World Fairs, more than 100 state fairs and festivals, and performed at countless air shows, military balls and special events. (U.S. Air Force photo/Senior Airman Brenden Marlin)