Corporal Mark F. Todd, an H-1 flight-line mechanic with the 24th Marine Expeditionary Unit’s Aviation Combat Element, Marine Medium Tiltrotor Squadron 365 (Reinforced), conducts flight maintenance on a UH-1Y Huey aboard the USS Iwo Jima, Oct. 28, 2014. Marines conduct 24/7 flight maintenance to maintain mission readiness for all MEU aircraft. (U.S. Marine Corps photo by Sgt. Devin Nichols) (U.S. Marine Corps photo by Sgt. Devin Nichols)