Cpl. Teome Matamua and Sgt. Phillip McIllvaney, Australian Army 176th Air Dispatch Squadron loadmasters, deliver the first low-cost, low-altitude bundle of Operation Christmas Drop 2015 to the island of MogMog, on Tuesday, Dec. 8, 2015. Australian and Japanese C-130 aircrews joined U.S. airmen during the 64th year of Operation Christmas Drop. Aircrews drop critical supplies to 56 islands throughout the Commonwealth of the Northern Marianas, Federated States of Micronesia and Republic of Palau. (Katrina Brisbin/U.S. Air Force)

A U.S. Air Force T-38 Talon, British Royal Air Force Typhoon, French air force Rafale and U.S. Air Force F-22 Raptor fly in formation as part of a trilateral exercise held at Langley Air Force Base, Va., on Monday, Dec. 7, 2015. (Kayla Newman/U.S. Air Force)

A KC-135R Stratotanker from the 121st Air Refueling Wing completes a flyover of the Mapfre Stadium in Columbus, Ohio, during the start of the Major League Soccer Cup final game on Sunday, Dec. 6, 2015. The Columbus Crew and the Portland Timbers played against each other for the championship cup. ()

A member of the 22nd Security Forces Squadron takes cover while participating in proficiency firing training on Friday, Dec. 4, 2015, at McConnell Air Force Base, Kan. (Tara Fadenrecht/U.S. Air Force)

Tech. Sgt. Stephen Upton shoots an M-16 rifle on a firing range near Kabul, Afghanistan, on Tuesday, Dec. 8, 2015. (Corey Hook/U.S. Air Force)

A Eurofighter Typhoon assigned to RAF Coningsby flies over RAF Lakenheath, England, on Tuesday, Dec. 8, 2015. Members of the U.S. 494th Fighter Squadron at Lakenheath trained with the RAF pilots to strengthen U.S. Air Force interoperability with the U.K. counterparts. (Emerson Nunez/U.S. Air Force)