U.S. soldiers approach a landing zone in a UH-60 Black Hawk in Kosovo on April 16, 2021. (Staff Sgt. Tawny Schmit/Army National Guard)Aviation Electronics Technician 2nd Class Robert Barber directs a P-8A Poseidon maritime patrol and reconnaissance aircraft on April 23, 2021, in the U.S. 5th Fleet area of operations. (MC2 Juan S. Sua/Navy)Airmen refuel a KC-10 Extender during exercise Nexus Dawn over Travis Air Force Base, Calif., April 27, 2021. (Air Force)U.S. Marine Corps Lance Cpl. Justin Cooper and Cpl. Jacob Siemsen fire a Javelin missile while conducting a live-fire combat rehearsal during Fuji Viper 21.3 at Combined Arms Training Center, Camp Fuji, Japan, April 12, 2021. (Lance Cpl. Jonathan Willcox/Marine Corps)Sailors conduct flight operations aboard the aircraft carrier USS Dwight D. Eisenhower (CVN 69) in the Arabian Sea, April 24, 2021. (MC3 Cameron Pinske/Navy)Soldiers rappel from a UH-60 Black Hawk during a 10-day air assault course at 25th Infantry Division Lightning Academy on April 22, 2021. (Spc. Jessica Scott/Army)An Air Force C-130 Hercules fires flares during exercise Southern Strike at Camp Shelby Joint Forces Training Center, Miss., April 25, 2021. (Sgt. Jovi Prevot/Army)A U.S. Marine Corps F-35B Lightning II joint strike fighter pilot arrives at Royal Air Force Lakenheath, England, April 26, 2021. The USMC aircraft completed a transatlantic flight before embarking aboard Her Majesty's Ship Queen Elizabeth for the United Kingdom's Carrier Strike Group 2021 deployment. (Airman 1st Class Jessi Monte/Air Force)New Marines with Fox Company, 2nd Recruit Training Battalion, participate in a motivational run at Marine Corps Recruit Depot San Diego, April 28, 2021. (Sgt. Brooke C. Woods/Marine Corps)