U.S. 5TH FLEET AREA OF RESPONSIBILITY (Dec. 13, 2014) U.S. Marine Corps Lance Cpl. Riley C. Wells, center, a machine gunner with Echo Company, Battalion Landing Team 2nd Battalion, 1st Marines, 11th Marine Expeditionary Unit (MEU), and native of Grundy Center, Iowa, watches over Saudi Marines as the range safety officer during bilateral machinegun live-fire training as part of exercise Red Reef 15 in the U.S. 5th Fleet area of responsibility, Dec. 13, 2014. Red Reef, is part of a routine theater security cooperation engagement plan between the U.S. Navy, U.S. Marine Corps and Royal Saudi Naval Forces that serves as an excellent opportunity to strengthen tactical proficiency in critical mission areas and support long-term regional security.