A U.S. Army Green Beret, assigned to 3rd Special Forces Group (Airborne), provides security for a mule carrying an Mk 47 grenade launcher during mule packing training on Fort Bragg, N.C., on Jan. 27, 2015. (Edward F French IV/U.S. Army)

Candidates from across Fort Polk complete their final day of training during 10th Mountain Division?s Light Fighter School, Air Assault course, by rappelling from the bay of a UH-60 Black Hawk on Feb. 19, 2015 at Fort Polk?s Honor Fiel in Louisiana. (Anri Baril/U.S. Army)

A Virginia Army National Guard aviation crew from the Sandston-based 2nd Battalion, 224th Aviation Regiment delivers food, mail and medicine on Feb. 19, 2015, to iced-in Tangier Island, Va. (Terra C. Gatti/U.S. Army)

Lt. Gen. Perry L. Wiggins, U.S. Army North (Fifth Army) commanding general, Fort Sam Houston, shares a kiss with his wife, Annette, during the H-E-B Alamo Run Fest half marathon Feb. 22, 2015. (Andrew Valles/U.S. Army)

Paratroopers assigned to the 173rd Brigade Support Battalion, 173rd Airborne Brigade, conduct an airborne operation from a U.S. Air Force 86th Air Wing C-130 Hercules aircraft Feb. 19, 2015 at Juliet Drop Zone in Pordenone, Italy. (Paolo Bovo/U.S. Army)

Paratroopers assigned to the 173rd Brigade Support Battalion, 173rd Airborne Brigade, prepare at Aviano Air Base, Italy, for an airborne operation on Juliet Drop Zone in Pordenone, Italy, on Feb. 19, 2015. (Paolo Bovo/U.S. Army)

Battery A, Field Artillery Squadron, 2nd Cavalry Regiment soldiers ready their M777 Howitzers during a live-fire exercise at the Grafenwoehr Training Area on Feb. 24, 2015. (William Tanner/U.S. Army)