Battle of the Battleships
A participant pedals his boat after flipping it over at the start of a race during the Battle of the Battleships competition May 15, 2015, at Ramstein Air Base, Germany. The competition began with races, where several teams were tasked to pedal their boats to one side of the pool and back as quickly as possible. (U.S. Air Force photo by Airman 1st Class Lane T. Plummer/Released)