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 serves as the final at-sea period for the 11th MEU and PHIBRON 5. It is designed to strengthen the blue-green team's ability to operate together and to respond to various situations while deployed. (U.S. Marine Corps photo by Cpl. Jonathan R. Waldman/RELEASED)