From left, the British Royal Navy Duke-class frigate HMS Kent (F78), the Supply-class combat support ship USNS Supply (T-AOE 6), the Blue Ridge-class command and control ship USS Mount Whitney (LCC 20), the Royal Danish Navy Absalon-class support ship HDMS Esbern Snare (L17) and the Swedish Royal Navy Visby-class corvette HMS Karlstad (K35) sail in formation in the Baltic Sea while a U.S. Air Force B-52H Stratofortress long-range bomber flies overhead during exercise Baltic Operations (BALTOPS) 2020, June 15, 2020. BALTOPS is the premier annual maritime-focused exercise in the Baltic Region, marking the 49th year of one of the largest exercises in Northern Europe enhancing flexibility and interoperability among allied and partner nations. (U.S. Navy photo by Mass Communication Specialist 2nd Class Damon Grosvenor)

BALTIC SEA (June 10, 2020) Royal Danish Navy HDMS Esbern Snare (L17) observes sunset during BALTOPS 2020, June 10. BALTOPS is the premier annual maritime-focused exercise in the Baltic region, enhancing flexibility and interoperability among allied and partner nations. (Photo courtesy of the Danish Task Group)

A U.S. Navy P-8A Poseidon approaches a U.S. Air Force KC-135 Stratotanker assigned to the 100th Air Refueling Wing, RAF Mildenhall, England, to be refueled during Exercise Baltic Operations, over Poland, June 9, 2020. BALTOPS brings together a robust professional constellation of allies and partners to conduct operations that safeguard security, prosperity and the free and open international order. (U.S. Air Force photo by Tech. Sgt. Emerson Nuñez)

U.S. Army Civil Military Support Element soldiers prepare boxes of latex gloves for shipping on 30 May 2020. The U.S. Government donated 1,000 liters of hand sanitizer and 25,000 latex gloves to the government of Latvia, which will use them in schools throughout the country to help students safely conduct year-end exams.

200608-N-BM428-1452 BALTIC SEA (June 8, 2020) Ships from nations participating in exercise Baltic Operations (BALTOPS) 2020 sail in formation while in the Baltic Sea, June 8, 2020. The ships pictured are (in alphabetical order by home nation): the Royal Canadian Navy Halifax-class frigate HMCS Fredericton (FFH 337), the German Navy Bremen-class frigate FGS Luebeck (F214), the German Navy Rhoen-Class replenishment oiler FGS Rhoen (A1443), the Royal Norwegian Navy Fridtjof Nansen-class frigate HNoMS Otto Suerdrup (F312), the U.S. Navy Blue Ridge-class command and control ship USS Mount Whitney (LCC 20), the U.S. Navy Arleigh Burke-class guided-missile destroyer USS Donald Cook (DDG 75), and the U.S. Navy Supply-class fast-combat support ship USNS Supply (T-AOE 6). BALTOPS is the premier annual maritime-focused exercise in the Baltic Region, marking the 49th year of one of the largest exercises in Northern Europe enhancing flexibility and interoperability among allied and partner nations. (U.S. Navy photo by Mass Communication Specialist 1st Class Kyle Steckler)

U.S. Air Force Senior Airman Juan Castro, 86th Logistics Readiness Squadron fuels distribution operator, detaches aircraft refueling equipment at Ramstein Air Base, Germany, May 5, 2020. Despite the coronavirus disease 19, airlift operations continued at Ramstein and Airmen followed safety precautions to continue the mission. (U.S. Air Force photo by Staff Sgt. Devin Boyer)

F-15 Eagles assigned to the 48th Fighter Wing conduct a flypast over Normandy, France in support of the 76th anniversary of D-Day June 6, 2020. An epic multinational operation, D-Day forged partnerships and reinforces trans-Atlantic bonds that remain to this day. (U.S. Air Force photo/ Master Sgt. Matthew Plew)

F-15 Eagles assigned to the 48th Fighter Wing conduct aerial refueling operations with a KC-135 Stratotanker assigned to the 100th Air Refueling Wing in support of the 76th anniversary of D-Day June 6, 2020. An epic multinational operation, D-Day forged partnerships and reinforces trans-Atlantic bonds that remain to this day. (U.S. Air Force photo/ Master Sgt. Matthew Plew)

F-15 Eagles assigned to the 48th Fighter Wing conduct a flypast over Normandy, France in support of the 76th anniversary of D-Day June 6, 2020. An epic multinational operation, D-Day forged partnerships and reinforces trans-Atlantic bonds that remain to this day. (U.S. Air Force photo/ Master Sgt. Matthew Plew)

F-15 Eagles assigned to the 48th Fighter Wing support a flypast over Normandy, France in support of the 76th anniversary of D-Day June 6, 2020. An epic multinational operation, D-Day forged partnerships and reinforces trans-Atlantic bonds that remain to this day. (U.S. Air Force photo/ Master Sgt. Matthew Plew)

A U.S. Marine with Special Purpose Marine Air-Ground Task Force-Crisis Response-Africa 20.2, sights in on his target during a battle-sight zero range on Móron Air Base, May 31, 2020. SPMAGTF-CR-AF 20.2 is deployed to conduct crisis-response and theater-security operations in Africa and promote regional stability by conducting military-to-military training exercises throughout Europe and Africa. SPMAGTF-CR-AF 20.2 continues to work closely with the relevant medical agencies, military organizations to minimize the risk of COVID-19 exposure. (U.S. Marine Corps photo by Cpl. Antonio F. Garcia)

On June 6, 1944, in Operation Overlord, Allied forces landed troops on the beaches of Normandy, France, for the largest amphibious assault in history. Gen. Dwight D. Eisenhower called the operation a crusade in which, “we will accept nothing less than full victory.”

Navy landing ships unload reinforcements, heavy weapons and additional supplies on Omaha Beach in Normandy, France, June 9, 1944. (Photo by National Archives)

Troops and crewmen aboard a Coast Guard Landing Craft, Vehicle, Personnel (LCVP) approach Normandy beach on D-Day, June 6, 1944. (Photo by Coast Guard/National Archives)

Senior U.S. officers watch operations from the bridge of USS Augusta (CA 31) off Normandy, June 8, 1944. They are from left to right: Commander Western Naval Task Force Rear Adm. Alan G. Kirk; Commanding General, U.S. First Army Lt. Gen. Omar N. Bradley; Chief of Staff Rear Adm. Arthur D. Struble; and Army Maj. Gen. Ralph Royce. (Photo by U.S. Navy/National Archives)

Army Gen. Dwight D. Eisenhower, supreme commander of the Allied Expeditionary Forces in Europe, talks to members of the 101st Airborne Division as they prepare for the massive paratrooper operation that began just after midnight, June 6, 1944, in Normandy. (Photo by U.S. Navy/National Archives)

Two B-1B Lancers from the 28th Bomb Wing, Ellsworth Air Force Base, South Dakota, conducted a long-range strategic Bomber Task Force mission to the Black Sea region, 29 May, 2020. During the mission, the two B-1s conducted training on the Long Range Anti-ship Missile (LRASM). Designed to target adversary ships, the LRASM gives the B-1 the ability to have advanced stand-off and counter-ship capabilities.

The 49th Baltic Operations (BALTOPS) exercise, the premier maritime-focused exercise in the Baltic Region, takes place in the Baltic Sea from June 7-16. Air and maritime assets from NATO allies and partner nations are involved in the live training events.

The 49th Baltic Operations (BALTOPS) exercise, the premier maritime-focused exercise in the Baltic Region, takes place in the Baltic Sea from June 7-16. Air and maritime assets from NATO allies and partner nations are involved in the live training events.

Two U.S. Air Force B-1 Lancers from Ellsworth Air Force Base, South Dakota conducted a long-range strategic Bomber Task Force mission

Airmen taking initiative using 3D printers to engineer face masks in an effort to combat the spread of Coronavirus