U.S. Marine Sgt. Andrew Fisher, left, and Sgt. Mark

U.S. Marine Sgt. Andrew Fisher, left, and Sgt. Mark Caruthers, Marine Light Attack Helicopter Squadron 369, 3rd Marine Aircraft Wing, remove a spool stop that holds the sensor on the main rotor of a Huey helicopter during Integrated Training Exercise 2-16 at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Feb. 6, 2016. MCAGCC conducts relevant live-fire combined arms, urban operations, and joint/coalition level integration training that promote operational forces' readiness. (U.S. Air Force photo by Tech. Sgt. Joselito Aribuabo/Released)