A RAF’s F-35B Lightning stealth fighter jet, left, a U.S. Air Force F-15E Strike Eagle, center, and a French Air Force multirole fighter aircraft Dassault Rafale fly behind a U.S. Air Force military aerial refueling aircraft KC-135 Stratotanker, over the English Channel, part of the Exercise Point Blank that brings together NATO allies to improve interoperability and integration between allied fourth and fifth-generation fighter aircraft and to demonstrate the U.S. commitment to regional security. Nov. 27, 2018. (U.S. Air Force photo by Senior Airman Luke Milano)

U.S. Marines, an Assault Breacher Vehicle Joint Assault Bridge Operator with the 1st Combat Engineer Battalion, 1st Marine Division prepares to set pins on a M60 Armored Vehicle Launched Bridge as part of the annual exercise Steel Knight 2019 that aims to demonstrate the Marines and Sailors skills, tactics, and combat readiness by performing various dynamic tasks, ground combat maneuver operations, and liver fire ranges. Marine Corps Air Ground Combat Center, Twentynine Palms, California, Nov. 28, 2018. (U.S. Marine Corps photo by Sgt. Miguel A. Rosales)

U.S. Soldiers and Marine Corps, the Special Purpose Marine Air-Ground Task Force 7, exercise non-lethal crowd control drills. The Calexico West Port of Entry in Calexico, California on Nov. 27, 2018. (U.S. Army photo by Pfc. Nyatan Bol)

A light armored vehicle with the 2nd Light Armored Reconnaissance Battalion guided by a U.S. Marine, the 24th Marine Expeditionary Unit, after participating in Exercise Trident Juncture in Norway and Iceland, and returning home from USS New York (LPD 21). Onslow Beach at Camp Lejeune, North Carolina, Nov. 30, 2018. (U.S. Marine Corps photo by Gunnery Sgt. Robert Durham)

The U.S. Navy Ticonderoga-class guided-missile cruiser USS Normandy transits the Adriatic Sea, while operating in the U.S. 6th Fleet area of operations with the Harry S. Truman Carrier Strike Group to enhance cooperation with regional allies and partners, as well as to strengthen regional stability. The Adriatic Sea, Nov. 27, 2018. (U.S. Navy photo by Mass Communication Specialist 2nd Class Ford Williams)

A military working dog handler of the U.S. Air Force Staff, the 8th Security Forces Squadron, a and military working dog, 8th SFS MWD, perform an building search operation at Kunsan Air Base, Republic of Korea, Nov. 20, 2018. (U.S. Air Force photo by Senior Airman Savannah L. Waters)

A squadron of CH-53 Super Stallion heavy-lift helicopters of the U.S. Marines CH-53 lands at Marine Corps Air Station New River, after participating in Exercise Trident Juncture 2018, where they provided vertical lift and transport in an amphibious environment. North Carolina, Nov. 30, 2018, (U.S. Marine Corps photo by Lance Cpl. Tanner Seims)

A U.S. Marine, the 2nd Battalion, 1st Marine Regiment, 1st Marine Division, sets up a defensive position at Marine Corps Base Camp Pendleton, during the annual exercise Steel Knight. California, Nov. 29, 2018. (U.S. Marine Corps photo by Cpl. Audrey M. C. Rampton)

U.S. Air Force Staff, an aerial port specialist with the 36th Contingency Response Group, marshals the military transport aircraft, C-130J Super Hercules that had picked up U.S. Army Reserves soldiers redeploying to Guam. The Saipan International Airport, Saipan, Commonwealth of the Northern Mariana Islands, Nov. 28, 2018. (U.S. Air Force Photo by Tech. Sgt. Joshua J. Garcia)

U.S. Reconnaissance Marines being instructed on which targets they will engage during a live-fire range at Camp Hansen, where they trained to stay familiar with the weapons systems that the Marines use. Okinawa, Japan, Nov. 27, 2018. (U.S. Marine Corps photo by Lance Cpl. Christian Ayers)

A multiple exposure photo depicts the multiple stages that a Javelin shoulder-fired anti-tank missile goes through, after it is fired by a U.S. Army infantryman, the Company C, 2nd Battalion, 198th Armor Regiment, 155th Armored Brigade Combat Team, Mississippi Army National Guard during the Exercise Eastern Action 2019, held at Al-Ghalail Range in Qatar, Nov. 14, 2018, (U.S. Army National Guard photo illustration by Spc. Jovi Prevot)

U.S. Army paratroopers, Dog Company, 3rd Battalion, 509th Parachute Infantry Regiment, 4th Infantry Brigade Combat Team (Airborne), 25th Infantry Division, U.S. Army Alaska, after donning gas masks, perform engaging a target using a M2A1 machine gun during mounted night live-fire training at Joint Base Elmendorf-Richardson, Alaska, Nov. 16, 2018, (U.S. Air Force photo by Alejandro Peña)

A U.S. Soldier showcases for the secretary of the Army the skills soldiers acquired at a training event, held at Fort Benning, Georgia, Nov. 19, 2018, (U.S. Army photo by Patrick Albright)

A U.S. Air Force F-35 Lightning IIs formation assigned to the 388th and 419th Fighter Wings performs aerial maneuvers during a combat power exercise over Utah Test and Training Range, which aims to confirm the participants’ ability for rapid employ of a large force of jets against air and ground targets, and to demonstrate the readiness and lethality of the F-35A., Nov. 19, 2018, (U.S. Air Force photo by Staff Sgt. Cory D. Payne)

A rescue operation performed by a U.S. Air Station Miami, Coast Guard rescue swimmer, who jumps out of a MH-65D Dolphin helicopter to simulate assisting an Airman, the 514th Air Mobility Wing, part of water survival training at Naval Air Station Key West’s Truman Harbor, Key West, Florida, Nov. 16, 2018, (U.S. Air Force photo by Master Sgt. Mark C. Olsen)

U.S. Navy Gunner’s Mate, foreground, attached to the 1st Class Tatiana Clarkfires, fires an M4 carbine during a qualification course on the board of the Arleigh-Burke class guided-missile destroyer USS Jason Dunham, which is deployed in the 5th Fleet Area of Operations, in support of naval operations in order to ensure maritime stability and security in the Central Region Nov. 17, 2018, (U.S. Navy photo by Mass Communication Specialist 3rd Class Jonathan Clay)

A U.S. Navy tactical patrol boat transits the Gulf of Tadjoura. The patrol boat is assigned to the Task Group 68.6, which is forward deployed to the U.S. 6th Fleet area of operations and performs joint naval operations, often together with allied and interagency partners, in order to advance U.S. national interests,security and stability in Europe and Africaat Camp Lemonnier. Nov. 15, 2018, (U.S. Navy photo by Mass Communication Specialist 2nd Class Timothy M. Ahearn)

A U.S. Air Force F-16 multi-role fighter assigned to the 36th Fighter Squadron at Osan Air Base, Republic of Korea, takes a position to receive fuel midair during a training flight over Republic of Korea, Nov. 19, 2018 (U.S. Air Force photo by Senior Airman Kelsey Tucker)

U.S. Border Patrol Agents watch over personnel who reinforces the border fence with concertina wire, the Border Field State Park in San Diego, Nov. 15, 2018. (U.S. Customs and Border Protection photo by Mani Albrecht)

A U.S. Navy F-35C Lightning II fly in formation for a photo exercise over California Nov. 16, 2018. Due to its stealth technology, advanced sensors, weapons capacity and range, the F-35C will be the first 5th generation aircraft operated from an aircraft carrier. (U.S. Navy photo by Chief Mass Communication Specialist Shannon E. Renfroe Released)

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)