An MH-60S Knighthawk with Helicopter Sea Combat Squadron

An MH-60S Knighthawk with Helicopter Sea Combat Squadron 23 (HSC-23) lands on the flight deck of the USS San Diego for vertical replenishment training during Certification Exercise (CERTEX), off the coast of Southern California, June 18, 2014. CERTEX is the final evaluation of the 11th MEU and Makin Island Amphibious Ready Group prior to deployment. The evaluation requires the Marines and sailors to plan and conduct integrated missions simulated to reflect real-world operations. (U.S. Marine Corps photo by Cpl. Jonathan R. Waldman/RELEASED)