A U.S. Marine fires his M4A1 service rifle during a deck shoot aboard amphibious assault ship USS America, March 26. - A U.S. Marine fires his M4A1 service rifle during a deck shoot aboard amphibious assault ship USS America, March 26.

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3rd MAW supports firefighting operations at Camp Pendleton - Marines with Marine Light Attack Helicopter Squadron (HMLA) 267 and HMLA-169, Marine Aircraft Group (MAG) 39, 3rd Marine Aircraft Wing, conduct water bucket drops over a brush fire in support of firefighting operations at Marine Corps Base Camp Pendleton, Calif., July 6. The “Pendleton Complex,” consisting of three separate fires, burned nearly 2,000 acres. In all, six aircraft from 3rd MAW conducted nearly 250 water drops over two separate fires in 30 hours. (Courtesy Photo)

Lance Cpl. Luis Da Luz, a hazardous material entry team technician with Aircraft Rescue and Fire Fighting, passes HAZMAT samples to Lance Cpl. Alex Herrero, a HAZMAT entry team technician with ARFF, during an exercise at Marine Corps Air Station Miramar, Calif., May 17. The exercise simulated a bioterrorism attack and required several MCAS Miramar units to coordinate an effective response. - Lance Cpl. Luis Da Luz, a hazardous material entry team technician with Aircraft Rescue and Fire Fighting, passes HAZMAT samples to Lance Cpl. Alex Herrero, a HAZMAT entry team technician with ARFF, during an exercise at Marine Corps Air Station Miramar, Calif., May 17. The exercise simulated a bioterrorism attack and required several MCAS Miramar units to coordinate an effective response.

Crash fire and rescue Marines with Marine Wing Support Squadron 372, based out of Marine Corps Air Station, Yuma, Arizona, douse a car fire on U.S. Interstate 8, Oct. 7, 2016. The Marines noticed a compact car bellowing smoke on the westbound side of the interstate near exit 36 while in route to provide crash fire and rescue support at an auxiliary landing exercise for C-130 aircraft at Stoval Airfield, located approximately 50 miles east of Yuma. - Crash fire and rescue Marines with Marine Wing Support Squadron 372, based out of Marine Corps Air Station, Yuma, Arizona, douse a car fire on U.S. Interstate 8, Oct. 7, 2016. The Marines noticed a compact car bellowing smoke on the westbound side of the interstate near exit 36 while in route to provide crash fire and rescue support at an auxiliary landing exercise for C-130 aircraft at Stoval Airfield, located approximately 50 miles east of Yuma.

An amphibious assault vehicle crewman with Alpha Company, 2nd Assault Amphibian Battalion, loads simulation rounds into a mounted MK-19 40mm grenade launcher during a live-fire gunnery range at Marine Corps Base Camp Lejeune, North Carolina, July 27, 2016. Marines with the battalion spent the day refining their marksmanship skill as individuals and their ability to work as a crew. - An amphibious assault vehicle crewman with Alpha Company, 2nd Assault Amphibian Battalion, loads simulation rounds into a mounted MK-19 40mm grenade launcher during a live-fire gunnery range at Marine Corps Base Camp Lejeune, North Carolina, July 27, 2016. Marines with the battalion spent the day refining their marksmanship skill as individuals and their ability to work as a crew.

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Aircraft Rescue and Firefighting Marines tackle some of their first fuel fires at Marine Corps Air Station Cherry Point, N.C., Oct. 16, 2015. The training exercise taught the new Marines how to battle the heat and keep pushing until they annihilate the flames, as well as get used to the environment of a real fire. - Aircraft Rescue and Firefighting Marines tackle some of their first fuel fires at Marine Corps Air Station Cherry Point, N.C., Oct. 16, 2015. The training exercise taught the new Marines how to battle the heat and keep pushing until they annihilate the flames, as well as get used to the environment of a real fire.

Marines with 8th Engineer Support Battalion, 2nd Marine Logistics Group fire at targets over 300 meters away with the M2 .50-caliber machine gun during a live-fire training exercise at a multipurpose machine gun range at Marine Corps Base Camp Lejeune, North Carolina, April 14, 2015. The hard work, time and effort put into the training helps the Marine Corps maintain mission readiness consistently by providing Marines with knowledge and experience, and strengthens their ability to work effectively in real situations by maintaining unit cohesion, said Bradley Marsh, an 8th ESB motor transportation Marine. - Marines with 8th Engineer Support Battalion, 2nd Marine Logistics Group fire at targets over 300 meters away with the M2 .50-caliber machine gun during a live-fire training exercise at a multipurpose machine gun range at Marine Corps Base Camp Lejeune, North Carolina, April 14, 2015. The hard work, time and effort put into the training helps the Marine Corps maintain mission readiness consistently by providing Marines with knowledge and experience, and strengthens their ability to work effectively in real situations by maintaining unit cohesion, said Bradley Marsh, an 8th ESB motor transportation Marine.

Marine scout snipers with Weapons Company, 2nd Battalion, 3rd Marine Regiment, conduct high angle shooting on Range 10 aboard Marine Corps Base Hawaii April 8, 2015. The training was different from their typical flat level or slight elevation ranges. The high angle is considered anything 30 degrees or greater. (U.S. Marine Corps photo by Sgt. Sarah Dietz) - Marine scout snipers with Weapons Company, 2nd Battalion, 3rd Marine Regiment, conduct high angle shooting on Range 10 aboard Marine Corps Base Hawaii April 8, 2015. The training was different from their typical flat level or slight elevation ranges. The high angle is considered anything 30 degrees or greater. (U.S. Marine Corps photo by Sgt. Sarah Dietz)

A Marine with 2nd Intelligence Battalion fires an M1014 Joint Service Combat Shotgun during a live-fire range aboard Marine Corps Base Camp Lejeune, N.C., April 2, 2015. Marines conducted the range to familiarize themselves with the weapon system as well as bolster their confidence in employing it. - A Marine with 2nd Intelligence Battalion fires an M1014 Joint Service Combat Shotgun during a live-fire range aboard Marine Corps Base Camp Lejeune, N.C., April 2, 2015. Marines conducted the range to familiarize themselves with the weapon system as well as bolster their confidence in employing it.

Marines with Charlie Company, 1st Reconnaissance Battalion, await extraction in a field during a live-fire raid at Range 226 aboard Camp Pendleton, Calif., April 1, 2015. The company conducted the live-fire exercise as part of a predeployment workup in support of the 13th Marine Expeditionary Unit. - Marines with Charlie Company, 1st Reconnaissance Battalion, await extraction in a field during a live-fire raid at Range 226 aboard Camp Pendleton, Calif., April 1, 2015. The company conducted the live-fire exercise as part of a predeployment workup in support of the 13th Marine Expeditionary Unit.