U.S. Army paratroopers use their riot-control training to push back the crowd and gain control during Silver Sabre, a training exercise, on Camp Vrelo, Kosovo, Nov. 20, 2014. The three-day event brings nations together to improve riot-control capabilities. The soldiers are assigned to the 25th Infantry Division's 1st Squadron, 40th Cavalry Regiment, 4th Infantry Brigade Combat Team. U.S. Army photo by Sgt. Melissa Parrish

U.S. soldiers participate in a turkey bowl as part of Thanksgiving activities on Camp Stanley, South Korea, Nov. 27, 2014. The soldiers, who competed in basketball and football tournaments, are assigned to the 1st Cavalry Division's 3rd Battalion, 8th Cavalry Regiment, 3rd Brigade Combat Team. U.S. Army photo by Staff Sgt. Steven Schneider

An MH-60R Seahawk helicopter transports dry cargo and ammunition from the Military Sealift Command fast combat support ship USNS Rainier to the aircraft carrier USS Carl Vinson during a replenishment at sea in the U.S. 5th Fleet area of responsibility, Nov. 26, 2014. The Carl Vinson is supporting Operation Inherent Resolve, strike operations in Iraq and Syria as directed, maritime security operations and theater security cooperation efforts in the region. U.S. Navy photo by Petty Officer 3rd Class Eric Coffer

U.S. Navy Petty Officer 2nd Class Roberto Valez enters the water during training in the 5th Fleet area of responsibility, Nov. 25, 2014. Valez, a diver, is assigned to Commander Task Group 56.1, which conducts mine countermeasures, explosive ordnance disposal, salvage diving and force protection operations. U.S. Navy photo by Petty Officer 2nd Class Wyatt Huggett

U.S. Deputy Defense Secretary Bob Work engages in an informal question-and-answer session with soldiers assigned to the International Security Assistance Force Joint Command in Kabul, Afghanistan, Nov. 28, 2014. Work traveled to Afghanistan to personally thank deployed troops on Thanksgiving Day for their service and sacrifice this holiday season. DoD photo by Glenn Fawcett

U.S. Deputy Defense Secretary Bob Work engages with troops at the Train, Advise and Assist Command South headquarters on Kandahar Airfield, Afghanistan, Nov. 28, 2014. Work traveled to Afghanistan to personally thank deployed troops on Thanksgiving for their service and sacrifice this holiday season. DoD photo by Glenn Fawcett

U.S. Deputy Defense Secretary Bob Work and his wife, Cassandra, right, join U.S. service members for Thanksgiving dinner on Bagram Airfield, Afghanistan, Nov. 27, 2014. Work traveled to Afghanistan to personally thank deployed troops on Thanksgiving Day for their service and sacrifice this holiday season. DoD photo by Glenn Fawcett

U.S. Deputy Defense Secretary Bob Work serves sliced turkey to troops and staff waiting in line for Thanksgiving lunch on Forward Operating Base Fenty in Afghanistan, Nov. 27, 2014. Work visited Afghanistan to thank service men and women for their service during the holidays. DoD photo by Glenn Fawcett