U.S. Marines an AAV (Assault Amphibious Vehicle) Crewman, Easy Company, 2nd Battalion, 2nd Marine Regiment, 2nd Marine Division, operates an assault amphibious vehicle during the exercise Trident Juncture 18, which provides the 2nd Marine Division to train in unique environments, supporting partner nations. Norway, Nov. 5, 2018. (U.S. Marine Corps photo by Cpl. Dominic Littleton)

The U.S. Marines’ M1A1 Abrams Main Battle Tank patrols during a predeployment training exercise at the Marine Corps Air Ground Combat Center (MCAGCC), also known as 29 Palm. Nov. 9, 2018. (U.S. Marine Corps photo by Lance Cpl. Dalton S. Swanbeck)

The U.S. Navy’s Lewis and Clark-class dry cargo ship, USNS William McLean, carries through a replenishment-at-sea with the Mercy-class hospital ship USNS Comfort in order to bring on fuel in the Caribbean Sea. The U.S. Navy hospital ship is on medical support mission to Central and South America, which is part of the U.S. Southern Command’s Enduring Promise initiative. The Caribbean Sea, Nov. 12, 2018. (U.S. Navy photo by Mass Communication Specialist 2nd Class Jacob Waldrop)

U.S. Marine Corps, the 7th Engineer Support Battalion, Special Purpose Marine Air-Ground Task Force 7, place concertina wire at the Otay Mesa Port of Entry in California on Nov. 11, 2018. (U.S. Marine Corps photo by Staff Sgt. Rubin J. Tan)

The U.S. Air Force military aerial refueling aircraft KC-135 Stratotanker fuels the F-16 Fighting Falcon in support of Operation Inherent Resolve over Iraq, where the KC-135 Stratotanker empowers the fight against ISIS by providing mission related to extending aerial refueling services to U.S. and Coalition forces that carry out operations in OIR’s area of responsibility. Iraq, Nov. 8, 2018. (U.S. Air Force photo by Staff Sgt. Jordan Castelan)

U.S. Marine Corps and Soldiers, Special Purpose Marine Air-Ground Task Force 7 fortify border which is fencing along the Southwest border, where they provide military support to the Department of Homeland Security and U.S. Customs and Border Protection in order to secure the U.S. Southern border. Nov. 11, 2018. U.S. Northern Command is providing. (U.S. Army photo by Pfc. Nyatan Bol)

US Navy’s amphibious transport dock USS Anchorage transits the Mediterranean Sea. The San Antonio-class amphibious transport dock and the embarked 13th Marine Expeditionary Unit are deployed to the U.S. 6th Fleet area of operations in order to provide a crisis response force, supporting the regional partners. They also boost the U.S. national security interests in Europe and Africa. Mediterranean Sea Nov. 5, 2018. (U.S. Navy photo by Mass Communication Specialist 3rd Class Ryan M. Breeden)

U.S. Customs and Border Protection’s Nogales Port Director Michael Humphries, in blue, briefs the Commander, U.S. Northern Command and North American Aerospace Defense Command, the U.S. Air Force Gen. Terrence J. O’Shaughnessy, right, at a fence near the Nogales Port of Entry. Nogales, Arizona, November 7, 2018. (U.S. Army photo by Spc. Hosannah Vickery)

A soldier of the Qatar Armed Forces engages a simulated target using an M4 carbine during bunker clearing training held with soldiers of the U.S. Army, the 2nd Battalion, 198th Armor Regiment, 155th Armored Brigade Combat Team, Task Force Spartan. The task is performed as part of the U.S. Army Central led Exercise Eastern Action, which gathers servicemen from Task Force Spartan and Qatar in support to the relationship between the two nations. 19, Nov. 7, 2018, Um Hattah, Qatar. (U.S. Army photo by Sgt. James Lefty Larimer)

U.S. Air Force Senior Airman with the U.S. Air Force Honor Guard ceremonial guardsman, marches in the Veterans Day Parade in New York, which is held to honor veterans as well as to inspire, recruit and retain future Airmen. New York, Nov. 11, 2018. (U.S. Air Force photo by Airman 1st Class Michael S. Murphy)

The U.S. Marines MV-22B Osprey aircraft attached to Marine Medium Tiltrotor Squadron 365 held flight operations during the NATO-led exercise Trident Juncture 18 at Vaernes Air Base, Norway, Nov. 1, 2018. (U.S. Marine Corps photo by Lance Cpl. Cody J. Ohira)

U.S. Marines attached to Marine Rotational Force-Europe 19.1 fire a round from a M777 ultra light howitzer during the bilateral Exercise Northern Screen held Setermoen, Norway. The exercise increases the proficiency in cold-weather, arctic, and mountainous environments of the participants, that include the U.S. Marine Corps’ Marine Rotational Force – Europe and Norwegian military. Norway, Oct. 31, 2018. (U.S. Marine Corps photo by Cpl. Ashley McLaughlin)

U.S. Army Paratroopers carry through an airborne operation at Malemute drop zone at the Joint Base Elmendorf-Richardson, Alaska,  The paratroopers are assigned to airborne unit with the ability for rapid deployment worldwide, and are trained to conduct military operations in harsh conditions. Alaska, Nov. 1, 2018. (U.S. Air Force photo by Justin Connaher)

A landing craft unit of the U.S. Navy enters the USS Fort McHenry’s well deck, part of the Composite Training Unit Exercise of the Carrier Strike Group 4 – COMPTUEX held in the Atlantic Ocean Nov. 1, 2018. (U.S. Navy photo by Mass Communication Specialist 3rd Class Chris Roys)

A U.S. Navy landing craft, air cushion attached to the San Antonio-class amphibious transport dock ship USS New York (LPD 21), transits the Norwegian Sea, participating in Trident Juncture 2018, November 1, 2018. (U.S. Navy photo by Mass Communication Specialist 2nd Class Lyle Wilkie)

U.S. Soldiers carry out combined arms breaching exercises at McCrady Training Center in Eastover, South Carolina. During the training the infantry companies (the South Carolina Army National Guard’s 4th Battalion, 118th Infantry Regiment, 218th Maneuver Enhancement Brigade) practiced attacking an objective, supported by the 174th engineer mobility assault platoons for obstacle reduction, destruction and short-gap crossings. South Carolina, Nov. 3, 2018. (U.S. Army photo by Staff Sgt. Jerry Boffen)

German soldiers board a U.S. Marines’ CH-53E Super Stallion heavy-lift helicopter during cold-weather training, part of the Exercise Trident Juncture 18 in Dalsbygda, Norway, Nov. 1, 2018. (U.S. Marine Corps photo by Cpl. David Delgadillo)

U.S. Soldiers, the 937th Route Clearance Company, the 20th Engineer Battalion and the 36th Engineer Brigade, transport luggage after their arrival at Davis-Monthan Air Force Base, Arizona, Nov. 3, 2018. (U.S. Army photo by Spc. Brandon Best)

NATO Allies’ demonstrations of their joint capabilities on land, air and sea for the official attendants and visitors during the Trident Juncture 2018 Distinguished Visitors’ Day at Trondheim, Norway, Oct. 30, 2018. (U.S. Air Force photo by TSgt Brian Kimball)

The Allies of NATO demonstrate land, air and sea armaments and equipment for the audience and the media, who attended the distinguished visitors’ day of the Trident Juncture 18. Trondheim, Norway, Oct. 30, 2018. (U.S. Air Force photo by Tech. Sgt. Brian Kimball)

The U.S. Marine Corps primary assault support aircraft MV-22B Osprey prepares to land on the flight deck of the Wasp-class amphibious assault ship USS Iwo Jima, which is currently underway participating in the NATO-led exercise Trident Juncture 2018, at the Norwegian Sea, Oct. 26, 2018, (U.S. Navy photo by Mass Communication Specialist 3rd Class Joe J. Cardona Gonzalez)

Paratrooper, who is assigned to the U.S. Army 1st Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade shoots pop-up targets using M4 carbine as part of marksmanship training, held at Cao Malnisio Range, Pordenone, Italy, Oct. 25, 2018, (U.S. Army photos by Paolo Bovo)

LM2500 gas turbine engine maintenance, performed by a U.S. Navy Gas Turbine Systems mechanical technician, on the board of the USS Sullivans guided-missile destroyer, during the destroyers’ naval support operations in the Arabian Gulf, Oct. 25, 2018, (U.S. Navy photo by Lt. Daphne White)

A U.S. Navy, attached to the 7th Fleet climbs down the Navy’s oldest operational ship Blue Ridge to its Rigid Hull Inflatable Boat, in order to join training during a man overboard drill at Yokosuka, Japan, Oct. 29, 2018, (U.S. Navy photo by Mass Communication Specialist 2nd Class Patrick Semales)

The U.S. Air Force all-weather multirole strike fighter F-15E Strike Eagle fueled from a KC-135 Stratotanker, while flying over Iraq in support of Operation Inherent Resolve, Oct. 25, 2018, (U.S. Air Force photo by Staff Sgt. Clayton Cupit)

Spanish snipers train their marksmanship, by firing at targets over 1.000 meters away using the .50-caliber Barrett and the .338-caliber Accuracy sniper rifles, during Exercise Trident Juncture 2018 in Folldal, Norway, Oct. 26, 2018, (1st German/Netherlands Corps)

A U.S. Sailor, the Explosive Ordnance Disposal Mobile Unit 1, Platoon 122, signals the crew of a boat before performing a mine countermeasure dive in in the Puget Sound off Oak harbor, part of the annual joint homeland Vigilant Shield 19 defense exercise, conducted between Canada and the U.S. The Puget Sound off Oak harbor, Wash, Oct. 27, 2018, (U.S. Navy photo by Mass Communication Specialist 3rd Class Clemente Lynch)

U.S. Navy Chief Aircrewman, the Patrol Squadron 47, performs flight operations on the board the multi-role maritime patrol aircraft, P-8 Poseidon, while the Patrol Squadron 47 Combat Aircrew Two patrols the Northern Mariana Islands, conducting humanitarian assistance and disaster relief in response to the aftermath of Typhoon Yutu. Philippine Sea, Oct. 29, 2018. (U.S. Navy Photo by Mass Communication Specialist 1st Class Kevin A. Flinn)

Participants from all over the world took part in the U.S. Marine Corps’ 43rd annual running marathon, also known as “The People’s Marathon”. The 26.2 mile race is traveling on a monumental course through Washington, D.C., and finishing at the Marine Corps War Memorial in Arlington, Virginia, Oct. 28, 2018, (U.S. Marine Corps photo by Cpl. Cristian L. Ricardo)

British Royal Navy’s Merlin Mk2 helicopter operates, embarked on the deck of the Type 23 frigate HMS Northumberland, in the North Atlantic off Norway during Exercise Trident Shield 18, part of the NATO-led Trident Juncture 18 exercise, Oct. 26, 2018, (Royal Navy photo by Jim Gibson)

The fifth patrol of the USS Carney destroyer in the U.S. 6th Fleet area of operations, when it transits the Strait of Gibraltar Oct. 12, 2018. (U.S. Navy photo by Mass Communication Specialist 1st Class Ryan U. Kledzik)

U.S. Servicemen, the 18th Field Artillery Brigade fire an M142 HIMARS during Red Flag-Alaska 19-1 realistic training exercise, near Fort Greely, Alaska, Oct. 9, 2018. (U.S. Air Force photo by Airman Aaron Guerisky)

A recruits’ graduation rehearsal held at Midway Ceremonial Drill Hall, at Recruit Training Center, Great lakes, Illinois. During the rehearsal the recruits are being asked questions by Recruit Training Command’s Command Master Chief David Twiford Oct. 11, 2018. (U.S. Navy photo by Mass Communication Specialist 2nd Class Camilo Fernan)

U.S. Marines, the 31st Marine Expeditionary Unit, participating in a special patrol insertion/extraction exercise in the Philippine Sea. The picture shows the Marines suspend from an MH-60S Sea Hawk helicopter, above the flight deck of the USS Wasp amphibious assault ship, Oct. 11, 2018. (U.S. Navy photo by Mass Communication Specialist 2nd Class Michael Molina)

U.S. Airmen, the 18th Component Maintenance Squadron assigned to maintain spare engines for Kadena Air Base’s fleet of F-15 Eagles, repair a F-15 Eagle aircraft engine, at Kadena Air Base, Japan, Oct. 12, 2018. (U.S. Air Force photo by Naoto Anazawa)

U.S. Aircraft Rescue and Firefighting Marines along with Headquarters and Headquarters Squadron perform tasks of fire containment at Marine Corps Air Station Iwakuni, Japan. The drill was conducted in order to enhance capabilities in extinguishing aircraft fires in support of the mission of launching and recovering aircraft of air station, Oct. 12, 2018. (U.S. Marine Corps photo by Cpl. Andrew Jones)

U.S. 4th Infantry Brigade Combat Team (Airborne), 25th Infantry Division, U.S. Army Alaska along with US Army paratroopers board multiple Air Force C-130J Hercules and C-17 Globemaster III aircraft while performing an operation of airborne assault during the joint, multi-national, force-on-force training exercise Arctic Anvil 19-01 at Joint Base Elmendorf-Richardson, Alaska, Oct. 9, 2018. (U.S. Air Force photo by Alejandro Peña)

Naval ships of the Republic of Korea approach during the International Fleet Review (IFR) pass in review of at Jeju Island, Republic of Korea. The IFR also performed training demonstrations at the Western Pacific Naval Symposium, a Maritime Defense Industry Exhibition/Seminar, and a worldwide ship opening event, Oct. 11, 2018. (U.S. Army photo by Sgt. Benjamin Parsons)

U.S. Soldiers along with the III Corps ride bicycles at Belton Lake Outdoor Recreation Area, Fort Hood, Texas, part of the Operation Phantom Warrior Salute Bike Race, Oct. 12, 2018. (U.S. Army photo by Spc. Connor Davis)

U.S. Marines and the Maritime Raid Force, 22nd Marine Expeditionary Unit, standby to carry out operations of free-fall parachute at Camp Lejeune, North Carolina, Oct. 10, 2018 (U.S. Marine Corps photo by Cpl. Aaron Henson)