Marines ride out on a combat rubber raiding craft as they prepare to conduct night infiltration Sept. 20 at U.S. Naval Base Guam during Exercise Valiant Shield 2014. Once night falls, the Marines will use a diver propulsion device to swiftly come ashore. Valiant Shield is a U.S.-only exercise integrating Navy, Air Force, Army, and Marine Corps assets, offering real-world joint operational experience to develop capabilities that provide a full range of options to defend U.S. interests and those of its allies and partners. The Marines are reconnaissance men with 3rd Reconnaissance Battalion, 3rd Marine Division, III Marine Expeditionary Force. (U.S. Marine Corps photo by Cpl. Lena Wakayama/Released) - Marines ride out on a combat rubber raiding craft as they prepare to conduct night infiltration Sept. 20 at U.S. Naval Base Guam during Exercise Valiant Shield 2014. Once night falls, the Marines will use a diver propulsion device to swiftly come ashore. Valiant Shield is a U.S.-only exercise integrating Navy, Air Force, Army, and Marine Corps assets, offering real-world joint operational experience to develop capabilities that provide a full range of options to defend U.S. interests and those of its allies and partners. The Marines are reconnaissance men with 3rd Reconnaissance Battalion, 3rd Marine Division, III Marine Expeditionary Force. (U.S. Marine Corps photo by Cpl. Lena Wakayama/Released)

A U.S. Air Force KC-10 Extender air refueling aircraft speeds down the flightline Sept. 15 at Andersen Air Base as Exercise Valiant Shield 2014 begins. Valiant Shield is a biennial exercise in which participating forces will focus on the integration of joint training among U.S. forces. The C-10 is with the 305th Air Mobility Wing, Air Mobility Command. (U.S. Marine Corps photo by Cpl. Lena Wakayama/Released) - A U.S. Air Force KC-10 Extender air refueling aircraft speeds down the flightline Sept. 15 at Andersen Air Base as Exercise Valiant Shield 2014 begins. Valiant Shield is a biennial exercise in which participating forces will focus on the integration of joint training among U.S. forces. The C-10 is with the 305th Air Mobility Wing, Air Mobility Command. (U.S. Marine Corps photo by Cpl. Lena Wakayama/Released)

An FA-18C Hornet catches an arrestment band Sept. 15 on West Field, Tinian, as part of Valiant Shield 2014. Valiant Shield is a biennial, U.S.-only, exercise with focus on integration of joint training among U.S. forces. The Hornet is with Marine Fighter Attach Squadron 115, currently assigned to Marine Aircraft Group 12, 1st Marine Aircraft Wing, III Marine Expeditionary Force, under the unit deployment program. (U.S. Marine Corps photo by Lance Cpl. Austin Schlosser/Released) - An FA-18C Hornet catches an arrestment band Sept. 15 on West Field, Tinian, as part of Valiant Shield 2014. Valiant Shield is a biennial, U.S.-only, exercise with focus on integration of joint training among U.S. forces. The Hornet is with Marine Fighter Attach Squadron 115, currently assigned to Marine Aircraft Group 12, 1st Marine Aircraft Wing, III Marine Expeditionary Force, under the unit deployment program. (U.S. Marine Corps photo by Lance Cpl. Austin Schlosser/Released)

Gunnery Sgt. Charles Maddox addresses the students at Tinian Junior Senior High School during a school visit Sept. 12 on Tinian. The Marines gave students a taste of Marine recruit training, taught them about different military occupational specialties, and introduced them to different military vehicles. The Marines are on Tinian as part of Exercise Valiant Shield 2014, a biennial exercise which focuses on training that enables real-world proficiency in sustaining joint forces. Maddox is the expeditionary air field staff noncommissioned officer-in-charge with Marine Wing Support Squadron 171, Marine Aircraft Group 12, 1st Marine Aircraft Wing, III Marine Expeditionary Force. (U.S. Marine Corps photo by Lance Cpl. Luis Ramirez/Released) - Gunnery Sgt. Charles Maddox addresses the students at Tinian Junior Senior High School during a school visit Sept. 12 on Tinian. The Marines gave students a taste of Marine recruit training, taught them about different military occupational specialties, and introduced them to different military vehicles. The Marines are on Tinian as part of Exercise Valiant Shield 2014, a biennial exercise which focuses on training that enables real-world proficiency in sustaining joint forces. Maddox is the expeditionary air field staff noncommissioned officer-in-charge with Marine Wing Support Squadron 171, Marine Aircraft Group 12, 1st Marine Aircraft Wing, III Marine Expeditionary Force. (U.S. Marine Corps photo by Lance Cpl. Luis Ramirez/Released)

An FA-18C Hornet makes an arrested landing using the M31 Marine Corps Expeditionary Arresting Gear System Sept. 15 at Tinian's West Field during Exercise Valiant Shield 2014. Arresting gear is used in order to land pilots in a short amount of space, or during an emergency. Valiant Shield is a biennial exercise which focuses on training that enables real-world proficiency in sustaining joint forces. The Hornet is with Marine Fighter Attack Squadron 115, currently assigned to Marine Aircraft Group 12, 1st Marine Aircraft Wing, III Marine Expeditionary Force. (U.S. Marine Corps photo by Cpl. David A. Walters/Released) - An FA-18C Hornet makes an arrested landing using the M31 Marine Corps Expeditionary Arresting Gear System Sept. 15 at Tinian's West Field during Exercise Valiant Shield 2014. Arresting gear is used in order to land pilots in a short amount of space, or during an emergency. Valiant Shield is a biennial exercise which focuses on training that enables real-world proficiency in sustaining joint forces. The Hornet is with Marine Fighter Attack Squadron 115, currently assigned to Marine Aircraft Group 12, 1st Marine Aircraft Wing, III Marine Expeditionary Force. (U.S. Marine Corps photo by Cpl. David A. Walters/Released)

A heavy equipment operator uses a 624 KR tractor, rubber tire, articulated, multipurpose, also known as a bucket loader, to knock over a tree at West Field, Tinian, Aug. 31 during Exercise Valiant Shield. Valiant Shield is a biennial exercise which focuses on training that enables real-world proficiency in sustaining joint forces. HE operators at Tinian are a mixture of operators from Combat Logistics Company 69, 9th Engineer Support Battalion and Marine Wing Support Squadron 171. The heavy equipment operator is with MWSS-171, Marine Aircraft Group 12, 1st Marine Aircraft Wing, III Marine Expeditionary Force. (U.S. Marine Corps photo by Cpl. D. A. Walters/Released) - A heavy equipment operator uses a 624 KR tractor, rubber tire, articulated, multipurpose, also known as a bucket loader, to knock over a tree at West Field, Tinian, Aug. 31 during Exercise Valiant Shield. Valiant Shield is a biennial exercise which focuses on training that enables real-world proficiency in sustaining joint forces. HE operators at Tinian are a mixture of operators from Combat Logistics Company 69, 9th Engineer Support Battalion and Marine Wing Support Squadron 171. The heavy equipment operator is with MWSS-171, Marine Aircraft Group 12, 1st Marine Aircraft Wing, III Marine Expeditionary Force. (U.S. Marine Corps photo by Cpl. D. A. Walters/Released)