Defense Secretary Ash Carter addressed members of the Defense Department in the Pentagon auditorium to say farewell to the department he's served and the people he's served with for 35 years.
Soldiers fire an M1A2 battle tank during the first accuracy test in Swietozow, Poland, Jan. 16, 2017, as part of an exercise to promote European security. Army photo by Staff Sgt. Micah VanDyke
The MQ-1 Predator and MQ-9 Reaper continue to shape the battle space in the campaign to defeat the Islamic State of Iraq and the Levant.
Year in Photos displays this year’s most compelling military images of operations, humanitarian efforts, training, defense leaders, athletes and lifestyle.

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Army Pfc. Matthew Guizer sights an 81 mm M252 mortar system during live-fire training at Wedrzyn, Poland, Nov. 30, 2016. Guizer is an indirect fire infantryman assigned to Headquarters Company, 2nd Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade -- a unit regularly stationed in Germany. This was the final training exercise for the unit in Poland and its continued support of Operation Atlantic Resolve with NATO Allies. Army photo by Sgt. William A. Tanner
NATO Aims to Transform Military Capacity, Alliance Official Says Story | Special Report | Flickr Album | Travels

U.S. Army M1A2 tank belonging to the 1st Battalion, 68th Armor Regiment, 3rd Armored Brigade Combat Team, 4th Infantry Division.
Rotational Brigade Fires First Tank-Training Rounds in Europe Story | Special Report

Undersecretary of Defense for Acquisition, Technology and Logistics Frank Kendall is greeted by Steve Wert, Battle Management program executive officer, on the flight line at Hanscom Air Force Base, Mass., Aug. 30. Kendall came to Hanscom to attend meetings at the Massachusetts Institute of Technology’s Lincoln Laboratory. (U.S. Air Force photo by Jerry Saslav)
Defense Acquisition Chief Lays Out Hard-Won Lessons Story

Operation Inherent Resolve - Targeted Operations Against ISIL Terrorists
U.S., Coalition Continue Strikes Against ISIL in Syria, Iraq Story | Special Report

An Iraqi squad leader explains the squad movement tactics during assault movement training at Al Asad Air Base, Iraq, Jan. 13, 2017. Training at building-partner-capacity sites is an integral part of Combined Joint Task Force Operation Inherent Resolve’s effort to train Iraqi security forces personnel to defeat the Islamic State of Iraq and the Levant. Army photo by Sgt. Lisa Soy
Iraqi Forces Liberate Mosul University From a Deeply Entrenched ISIL Story | Transcript | Special Report

Defense Secretary Ash Carter hosts Deputy Defense Secretary Bob Work during Work's farewell ceremony at the Pentagon in Washington, D.C., Jan. 13, 2017. DoD photo by Army Sgt. Amber I. Smith
Deputy Secretary Receives DoD's Highest Civilian Honor Story | Transcript


Military Medicine Expanding Options for Combat Casualties
Osseointegration, a process which attaches a prosthetic limb directly to the skeleton, can be an alternative option to traditional socket-based prosthetics for qualified patients. It is currently undergoing clinical trials at Walter Reed National Military Medical Center in Bethesda, Maryland. Navy photo by MC2 Joshua D. Sheppard
Military health experts are collaborating with civilian researchers on an alternative to socket-based prosthetics.
Army Researchers Work to Keep Sand From Ruining Equipment
Besides the danger of low-visibility, sand and dust wreak havoc inside aircraft engines. As molten sand accumulates inside gas turbine engines, air flow is restricted caused loss of power. Army scientists and engineers are working to discover sandphobic coatings to save lives. Army photo
Sand can wreak havoc on military engines performing vital operations in the field. Researchers are working to prevent that.

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