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Lance Cpl. Alexander N. Tirona, a rifleman with India Company, Battalion Landing Team, 3rd Battalion, 5th Marines, clears a room during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

Marines with Battalion Landing Team, 3rd Battalion, 5th Marines, clear an abandoned house during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

Marines with Battalion Landing Team, 3rd Battalion, 5th Marines, detain a role player while clearing a room during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

Marines with Battalion Landing Team, 3rd Battalion, 5th Marines, clear a room during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

Cpl. Floyd R. Tidwell, a team leader with India Company, Battalion Landing Team, 3rd Battalion, 5th Marines, sets security in the rain during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

Lance Cpl. Elijah Gums, a rifleman with Battalion Landing Team, 3rd Battalion, 5th Marines, sets security during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit.The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

Lance Cpl. Stephen A. Stauffer, a rifleman with Battalion Landing Team, 3rd Battalion, 5th Marines, takes a break during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

Lance Cpl. Elijah Gums, a rifleman with India Company, Battalion Landing Team, 3rd Battalion, 5th Marines, briefs another Marine on the plan to clear an abandoned building during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

Lance Cpl. Eric K. Heinrich, an Assault Amphibious Vehicle crewmember with Battalion Landing Team, 3rd Battalion, 5th Marines, clears a room during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

U.S. Marine Corps Lance Cpl. Alexander N. Tirona, a rifleman with India Company, Battalion Landing Team, 3rd Battalion, 5th Marines, clears a room during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, Aug. 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue)

Photo by Cpl. Amaia Unanue

Cpl. Shaun Chamberlin, a team leader with India Company, Battalion Landing Team, 3rd Battalion, 5th Marines, clears a room during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

Lance Cpl. Austin C. Henry, a rifleman with India Company, Battalion Landing Team, 3rd Battalion, 5th Marines, clears a room during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

Marines with Battalion Landing Team, 3rd Battalion, 5th Marines, enter an abandoned building during Military Operations in Urbanized Terrain (MOUT) training at Andersen South Air Force Base, Guam, August 30, 2017. Marines with BLT 3/5 train regularly in different environments to maintain their readiness as the Ground Combat Element of the 31st Marine Expeditionary Unit. The 31st MEU partners with the Navy's Amphibious Squadron 11 to form the Bonhomme Richard Expeditionary Strike Group, providing a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Amaia Unanue/Released)

Photo by Cpl. Amaia Unanue

TONGATAPU ISLAND, Tonga — U.S. Marines and sailors with Task Force Koa Moana 17, Tonga’s His Majesty’s Armed Forces, French soldiers and members of the New Zealand Defense Force stand at attention as a Tongan flag is raised during the opening ceremony of Exercise TAFAKULA July 17 on Tongatapu Island, Tonga. The ceremony marks the start of two weeks of infantry and law enforcement training between the militaries.

Photo by Sgt. Douglas Simons

A firefighter with the Marine Corps Air Station Miramar Fire Department decontaminates a suspect and a military police officer with the Provost Marshal’s Office during a Chemical, Biological, Radiological, Nuclear and High-Yield Explosives exercise at the gas chamber aboard Marine Corps Air Station Miramar, Calif., May 18, 2016. The exercise revolved around PMO, the Miramar Fire Department, Explosive Ordnance Disposal, and Aircraft Rescue and Firefighting working together to identify and eliminate the threat of a simulated clandestine drug lab.

Photo by Cpl. Alissa Schuning

A military police officer with the Provost Marshal’s Office guards the door to the gas chamber during a Chemical, Biological, Radiological, Nuclear and High-Yield Explosives exercise aboard Marine Corps Air Station Miramar, Calif., May 18, 2016. The exercise revolved around the PMO, Miramar Fire Department, Explosive Ordnance Disposal, and Aircraft Rescue and Firefighting working together to identify and eliminate the threat of a simulated clandestine drug lab.

Photo by Cpl. Alissa Schuning

A civilian law enforcement officer and a military police officer with the Provost Marshal’s Office apprehends a suspect during a Chemical, Biological, Radiological, Nuclear and High-Yield Explosives exercise at the gas chamber aboard Marine Corps Air Station Miramar, Calif., May 18, 2016. The exercise revolved around PMO, the Miramar Fire Department, Explosive Ordnance Disposal, and Aircraft Rescue and Firefighting working together to identify and eliminate the threat of a simulated clandestine drug lab.

Photo by Cpl. Alissa Schuning

A Spanish Air Force F/A-18 Hornet with 462 Squadron breaks off after receiving fuel from a U.S. Marine Corps KC-130J with Marine Aerial Refueler Transport Squadron 252, Special-Purpose Marine Air-Ground Task Force-Crisis Response- Africa during an aerial refuel mission, Gran Canaria, Spain, Mar. 29, 2016. SPMAGTF-CR-AF Marines and Spanish airmen conducted air-to-air refueling missions in order to enhance crisis response readiness and help build relationships between the two militaries.

Photo by Sgt. Kassie McDole

U.S. Marines with Task Force Spartan, 26th Marine Expeditionary Unit, board a CH-47 Chinook helicopter in Taji, Iraq, before heading to Kara Soar for their mission in support of Operation Inherent Resolve on March 17, 2016. Operation Inherent Resolve is an international U.S. led coalition military operation created as part of a comprehensive strategy to degrade and defeat the Islamic State of Iraq and the Levant.

Photo by Cpl. Andre Dakis

U.S. Army AH-64D Apache Longbow helicopters escort two CH-47 Chinook helicopters carrying U.S. Marines with Task Force Spartan, 26th Marine Expeditionary Unit, over Taji, Iraq, as they head to Kara Soar for their mission in support of Operation Inherent Resolve on March 17, 2016. Operation Inherent Resolve is an international U.S. led coalition military operation created as part of a comprehensive strategy to degrade and defeat the Islamic State of Iraq and the Levant.

Photo by Cpl. Andre Dakis