A Bulgarian soldier of 4th Company, 3rd Mechanized Battalion, 61st Mechanized Brigade provides security during training exercise Saber Junction 2014 at the Joint Multinational Readiness Center in Hohenfels, Germany, Sept. 3, 2014. (Carol A. Lehman/U.S. Army)

Sgt. Richard Z. Pyle shakes hands with President Barack Obama during a troop event held Sept. 3, 2014, in Tallinn, Estonia. Pyle is a Pittsburgh native and member of Company B, 2nd Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade. (Allen Porter/U.S. Army)

A Japan Ground Self-Defense Force member guides a Cobra anti-tank helicopter onto a forward aircraft refueling point at Yakima Training Center, Wash., Sept. 4, 2014. The exercise was part of Operation Rising Thunder, a combined operation between the Army and Japan designed to increase interoperability. (Cody Quinn/U.S. Army)

Japan Ground Self Defense Force members prepare a Type 10 battle tank for a maneuver training exercise at Yakima Training Center, Wash., Sept. 3, 2014. The exercise was part of Operation Rising Thunder, a combined operation between the Army and Japan designed to increase interoperability. (Cody Quinn/U.S. Army)

U.S. Army Spc. Michael Merino, with Headquarters and Headquarters Company, 18th Combat Sustainment Support Battalion, negotiates a rope obstacle at the 7th Army Joint Multinational Training Command's Grafenwoehr Training Area, Germany, Sept. 4, 2014. (Markus Rauchenberger/U.S. Army)

A soldier from 2nd Battalion, 1st Infantry Regiment, 2nd Stryker Brigade Combat Team, 2nd Infantry Division, drinks the blood from a recently killed cobra snake during the Jungle Survival class of Garuda Shield 14 in Asem Bagus, Indonesia, on Sept. 4, 2014. (Brian Erickson/U.S. Army)

A Slovenian soldier provides security during training exercise Saber Junction 2014 at the Joint Multinational Readiness Center in Hohenfels, Germany, Sept. 4, 2014. Saber Junction 2014 prepares U.S., NATO allies and European security partners to conduct unified land operations. (Tyler Kingsbury/U.S. Army)

Staff Sgt. Jeffrey Ellis, a drill sergeant with 1/320th Infantry Brigade Combat Team, 98th Training Division, United States Army Reserve, demonstrates the proper way to tackle the Hand Grenade Qualification Course for a group of soldiers in Basic Combat Training at Fort Jackson, S.C. (Brian Hamilton/U.S. Army)

Troops assigned to 3rd Platoon, Apache Troop, 1st Squadron, 2nd Cavalry Regiment get ready to disembark their flight for a night time airfield seizure mission during Exercise Steadfast Javelin II at Leilvarde Airbase, Latvia, Sept. 5, 2014. Steadfast Javelin is a NATO exercise involving over 2,000 troops from 10 nations. (William Tanner/U.S. Army)

A soldier with the 2nd Cavalry Regiment sits atop a Stryker armored vehicle during NATO exercise Steadfast Javelin II at Lielvarde Airbase, Latvia, Sept. 6, 2014. The Strykers were brought in by U.S. Air Force C-17s just hours after 500 paratroopers from the U.S. 173rd Airborne Brigade, the Royal Canadian Regiment and the Italian Folgore Brigade jumped in to "seize" the airfield. (Michael T. Crawford/U.S. Army)

Spc. Matthew Bowers, a CH-47F Chinook helicopter crew chief with Task Force Flying Dragons, reloads an M240B machine gun aboard a Chinook during aerial door gunnery training Sept. 7, 2014, at a training site in Southern Afghanistan. (Bryan Lewis/U.S. Army)

Paratroopers of 1st Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade board a U.S. Air Force C-130 for departure from Lielvarde Airbase, Latvia, Sept. 8, 2014, at the conclusion of NATO exercise Steadfast Javelin II. NATO paratroopers occupied the airbase for several days to launch follow-on operations after "seizing" it the night of Sept. 5, 2014. (Michael T. Crawford/U.S. Army)

U.S. soldiers and cadre members at the 7th Army Noncommissioned Officer Academy conduct physical readiness training at Grafenwoehr, Germany, Sept. 10, 2014. (Training Support Activity Europe)