Former Sergeant Major of the Army Kenneth O. Preston at his retirement ceremony

March 1, 2011 - Photo by D. Myles Cullen

Former Sergeant Major of the Army Kenneth O. Preston at his retirement ceremony - Download Hi-Res photo

Former Sgt. Maj. of the Army Kenneth O. Preston makes his way to his retirement ceremony at Conmy Hall, Joint Base Myer-Henderson Hall, Va., March 1.

First Lieutenant Michael Keyser crawls through an obstacle during Pre-Ranger Assessment Course

March 1, 2011 - Photo by Sgt. Giancarlo Casem

First Lieutenant Michael Keyser crawls through an obstacle during Pre-Ranger Assessment Course - Download Hi-Res photo

First Lt. Michael Keyser, with A Troop, 1st Squadron, 11th Armored Cavalry Regiment, crawls through an obstacle during the Pre-Ranger Assessment Course at Fort Irwin, Calif., March 1.

Soldier with 10th Special Forces Group and his military working dog jump off the ramp of a CH-47 Chinook helicopter

March 1, 2011 - Photo by U.S. Air Force Tech. Sgt. Manuel J. Martinez

Soldier with 10th Special Forces Group and his military working dog jump off the ramp of a CH-47 Chinook helicopter - Download Hi-Res photo

A Soldier with the 10th Special Forces Group and his military working dog jump off the ramp of a CH-47 Chinook helicopter from the 160th Special Operations Aviation Regiment during water training over the Gulf of Mexico as part of exercise Emerald Warrior 2011, March 1. Emerald Warrior is an annual two-week joint/combined tactical exercise sponsored by U.S. Special Operations Command designed to leverage lessons learned from operations Iraqi and Enduring Freedom to provide trained and ready forces to combatant commanders.

Staff Sergeant Joshua Hancock examines a sheep in Khenj district, Afghanistan

March 5, 2011 - Photo by Senior Airman Amber Ashcraft

Staff Sergeant Joshua Hancock examines a sheep in Khenj district, Afghanistan - Download Hi-Res photo

Staff Sgt. Joshua Hancock, assistant Panjshir agricultural lead, Kentucky Agribusiness Development Team II and Monticello, Ky. native, examines a sheep in Khenj district, Afghanistan, March 5. The Kentucky ADT II examines more than 120 pregnant sheep in three districts and teaches farmers and herders how to use the results to improve the health of their flocks.

Sergeant Carl Goss secures an area near a bridge construction site in Zabul province, Afghanistan

March 13, 2011 - Photo by Master Sgt. Adrian Cadiz

Sergeant Carl Goss secures an area near a bridge construction site in Zabul province, Afghanistan - Download Hi-Res photo

Sgt. Carl Goss, Provincial Reconstruction Team Zabul, secures an area near a bridge construction site in Zabul province, Afghanistan, while members from the U.S. Army Corps of Engineers inspect the progress and quality of several bridges being built in the area. The PRT consists of members from the Air Force, Army and civilian agencies. Goss is deployed from the 181st Infantry Regiment, Massachusetts Army National Guard.

Soldiers practice evacuating a casualty in Camp Ramadi, Iraq

March 15, 2011 - Photo by Spc. Gary Silverman

Soldiers practice evacuating a casualty in Camp Ramadi, Iraq - Download Hi-Res photo

U.S. Soldiers assigned to 442nd Military Police Company, New York National Guard and 4th Advise and Assist Brigade, 3rd Infantry Division, practice evacuating a casualty in Camp Ramadi, Iraq, March 15.

Soldiers carry casket of Army Corporal Frank Woodruff Buckles, the last American World War I veteran, for his funeral ceremony at Arlington National Cemetery, Virginia

March 15, 2011 - Photo by Staff Sgt. Adora Gonzalez

Soldiers carry casket of Army Corporal Frank Woodruff Buckles, the last American World War I veteran, for his funeral ceremony at Arlington National Cemetery, Virginia - Download Hi-Res photo

Soldiers of 1st Battalion, 3rd U.S. Infantry Regiment (The Old Guard) carry the casket of Army Cpl. Frank Woodruff Buckles, the last American World War I veteran, for his funeral ceremony at Arlington National Cemetery, Va., March 15.

Soldiers prepare to cross the finish line after 12-mile road march during The Old Guard’s Expert Infantryman Badge testing at Fort A.P. Hill, Virginia

March 21, 2011 - Photo by Staff Sgt. Adora Gonzalez

Soldiers prepare to cross the finish line after 12-mile road march during The Old Guard’s Expert Infantryman Badge testing at Fort A.P. Hill, Virginia - Download Hi-Res photo

Soldiers with the 3rd U.S. Infantry Regiment (The Old Guard) prepare to cross the finish line after a 12-mile road march during The Old Guard’s Expert Infantryman Badge testing at Fort A.P. Hill, Va., March 21. The 12-mile road march is the final event in the EIB testing, Soldiers who cross the finish line within the three hour time limit are awarded the EIB.

Soldiers learn to use rescue equipment in Alaska’s harsh winter conditions in a Cold Weather Leaders Course

March 25, 2011 - Photo by Sgt. Trish McMurphy

Soldiers learn to use rescue equipment in Alaska’s harsh winter conditions in a Cold Weather Leaders Course - Download Hi-Res photo

Soldiers learn to use rescue equipment in harsh winter conditions in a Cold Weather Leaders Course at the Army’s Northern Warfare Training Center at Black Rapids Training Site, Alaska. During the two-week course, the students learn a variety of survival skills and cold weather tactics.

Soldier returns fire with a M249 light machine gun during combat operations in the valley of Barawala Kalet, Kunar province, Afghanistan

March 29, 2011 - Photo by Pfc. Cameron Boyd

Soldier returns fire with a M249 light machine gun during combat operations in the valley of Barawala Kalet, Kunar province, Afghanistan - Download Hi-Res photo

A Soldier with the 101st Airborne Division returns fire with a M249 light machine gun during combat operations in the valley of Barawala Kalet, Kunar province, Afghanistan, March 29.