Santa Claus greets U.S. Marines assigned to Marine Light Attack Helicopter Squadron (HMLA) 469, Marine Aircraft Group 39, 3rd Marine Aircraft Wing, and their families during the HMLA-469 annual holiday party at Marine Corps Air Station Camp Pendleton, Calif., Dec. 8, 2018. (Cpl. Juan Bustos/Marine Corps)The Arleigh-Burke class guided-missile destroyer USS Jason Dunham (DDG 109) transits the Suez Canal on Dec. 1, 2018. (MC2 Jonathan Clay/Navy)KC-135R Stratotanker refueling aircraft from the New Jersey Air National Guard’s 108th Wing sit on the flight line during sunrise on Joint Base McGuire-Dix-Lakehurst, N.J., Dec. 8, 2018. (Master Sgt. Matt Hecht/Air National Guard)The flag-draped casket of former President George H.W. Bush passes through Magnolia, Texas, Thursday, Dec. 6, 2018, along the train route from Spring to College Station, Texas. (David J. Phillip/AP Pool)Expedition 58 Flight Engineer Anne McClain of NASA speaks with friends and family after having her Russian Sokol suit pressure checked in preparation for her launch aboard the Soyuz MS-11 spacecraft on Dec. 3, 2018, at the Baikonur Cosmodrome in Kazakhstan. Launch of the Soyuz rocket carried McClain, Soyuz Commander Oleg Kononenko of Roscosmos, and Flight Engineer David Saint-Jacques of the Canadian Space Agency (CSA) into orbit to begin their six-and-a-half-month mission on the International Space Station. (Aubrey Gemignani/NASA)The crew of an Air Station Barbers Point MH-65 Dolphin helicopter raises their rescue swimmer during a search-and-rescue exercise in the vicinity offshore from Ko'olina to Kahe Point, Oahu, on Nov. 29, 2018. (Lt. j.g. Joshua Martin/Coast Guard)A U.S. Marine Corps MV-22B Osprey conducts flight operations during Trident Juncture 18 at Vaernes Air Base, Norway, Nov. 1, 2018. (Lance Cpl. Cody J. Ohira/Marine Corps)An E-2C Hawkeye prepares to land on the flight deck aboard the Nimitz-class aircraft carrier USS John C. Stennis (CVN 74) in the Indian Ocean on Dec. 3, 2018. John C. Stennis is underway conducting routine operations in the U.S. Pacific Fleet area of operations. (Mass Communication Specialist Seaman Joshua L. Leonard/Navy)Two F-16 Fighting Falcons from the 149th Fighter Wing, Air National Guard, line the apron at Natal Air Force Base in Natal, Brazil, Nov. 16, 2018. Members of the 149th FW will be participating in CRUZEX 2018, a multi-national combat air exercise, being held Nov. 18-30. (Tech. Sgt. Mindy Bloem/Air National Guard)