U.S. Army Reservist Spc. Matt Harcarik, 411th Chemical Company, 479th Chemical Battalion, 302nd Maneuver Enhancement Brigade, performs the tire-flip segment of Mystery Event 1 during the 2013 412th Theater Engineer Command's Best Warrior Competition at Fort Devens, Mass. April 21. Mystery Event 1 consisted of an obstacle/confidence course timed evaluation. Competitors were required to flip the 450-500 pound tire over twice.