U.S. Army Sgt. 1st Class Dennis Roe, with the 52nd Signal Battalion, prepares a gas chamber for their annual Chemical Biological Radiological and Nuclear training at the Boeblingen Local Training Area, Germany, on Sept. 9, 2014. (Jason Johnston/U.S. Army)

Sgt. Michael Garret, 4-23 Infantry Regiment, instructs Spc. Kevin Ryan before firing his weapon during a sniper exercise at Yakima Training Center, Wash., Sept. 10, 2014. (Deja Borden/U.S. Army)

Firefighters, assigned to the Baumholder Fire Department, extract a ''patient'' from a rooftop during an exercise at Smith Barracks, Baumholder, Germany, Sept. 10, 2014. (Erich Backes/U.S. Army)

Competitors at the 2014 Army Drill Sergeant of the Year and Advanced Individual Training, Platoon Sergeant of the Year competitions prepare to take stage at the awards presentation. (Brian Hamilton/U.S. Army)

Members of Company C of the 3rd U.S. Infantry Regiment (The Old Guard), perform their ceremonial duties while being critiqued by senior members at Summerall Field on Joint Base Myer-Henderson Hall, Va., Sept. 10, 2014. (Cody W. Torkelson/U.S. Army)

Members of the Joint Armed Forces Color guard provide ceremonial support to Honor Flight San Antonio de Valero, Sept. 13, 2014, at the World War 2 Memorial in Washington D.C. (Klinton Smith/U.S. Army)

An AH-64E Apache Guardian from the 25th Infantry Division, and a Mi-35 Attack Helicopter from 31st Squadron, Tentara Nasional Indonesia Angkatan Darat, take off for a flight together during an attack/reconnaissance training mission in Semarang, Indonesia, Sept. 9, 2014. (U.S. Army photo)

Traditional Ukrainian dancers perform a traditional dance for the participants of Rapid Trident 2014 during the exercises opening ceremony Sept. 15, 2014. Rapid Trident is an annual U.S. Army Europe conducted, Ukrainian led multinational exercise designed to enhance interoperability with allied and partner nations while promoting regional stability and security. (Joshua Leonard/U.S. Army)

Retired Command Sgt. Maj. Bennie G. Adkins participating in a press conference just after receiving the Medal of Honor at the White House, Sept. 15, 2014. Adkins distinguished himself during 38 hours of close-combat fighting against enemy forces on March 9 to 12, 1966. (Bernardo Fuller/U.S. Army)

Staff Sgt. Stephen Shubert, EOD team leader, and Royal Bahamas Defense Force Leading Seaman Malford Ingraham discuss the results of an EOD training exercise, on Sept. 9, 2014. (Guy Volb/U.S. Army)

A pair of Ukrainian Soldiers instruct a group of Bulgarian Soldiers on counter improvised explosive device training during a cordon and search situational training exercise lane at Rapid Trident 2014 on Sept. 17, 2014. (Joshua Leonard/U.S. Army)