Coalition forces fire a Carl Gustaf recoilless rifle during a training exercise in Afghanistan's Helmand province in 2013. Spc. Justin Young/U.S. Department of Defense/DVIDS hide caption

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Spc. Justin Young/U.S. Department of Defense/DVIDS

Do U.S. Troops Risk Brain Injury When They Fire Heavy Weapons?

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Inside DARPA, The Pentagon Agency Whose Technology Has 'Changed the World'

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People gather near a Turkish army tank in Istanbul on July 16, after a group within Turkey's military attempted a coup. Since then, more than 100,000 people been detained, fired or suspended from their jobs on suspicion of sympathizing with or aiding the coup attempt. Defne Karadeniz/Getty Images hide caption

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Fearing Arrest At Home, Turkish Military Officers Seek Asylum In U.S.

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President-elect Donald Trump points to his supporters during his "Thank You" rally in Fayetteville, N.C., on Tuesday night. Sara D. Davis/Getty Images hide caption

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Former Marine Corps Gen. James Mattis, now President-elect Donald Trump's nominee to lead the Defense Department, at a 2011 congressional hearing. Chris Kleponis/AFP/Getty Images hide caption

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Military medics, medical corps and technicians from every branch of the military attend courses at the Medical Education and Training Campus in San Antonio. Wendy Rigby/Texas Public Radio hide caption

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Wendy Rigby/Texas Public Radio

Lessons From 2 War Zones Make A Difference In Medic Training

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Lt. Col. Alan Brown stands in his garage, filled with boxes that will be sent to the family's new home in New York. In the background is Lucy, the family's Schnauzer. Zachariah Hughes/Alaska Public Media hide caption

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Zachariah Hughes/Alaska Public Media

As Military Moving Costs Rise, It's Difficult For Officials To Keep Track

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Democratic presidential nominee Hillary Clinton speaks during the Commander-in-Chief Forum in New York City on Wednesday evening. Justin Sullivan/Getty Images hide caption

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Micah Johnson, who authorities have identified as the shooter who killed five law enforcement officers in Dallas on July 7 during a protest over recent fatal police shootings of black men. AP hide caption

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AP

Defense Secretary Ash Carter announces new rules allowing transgender individuals to serve openly in the U.S. military, during a news conference at the Pentagon on Thursday. Alex Brandon/AP hide caption

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Alex Brandon/AP

Pentagon Says Transgender Troops Can Now Serve Openly

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U.S. soldiers carry a 155 mm artillery round for a live-fire training exercise during the Anakonda war games near Olezno, Poland, on June 14. Sgt. Ashley Marble/55th Combat Camera via DVIDS hide caption

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Sgt. Ashley Marble/55th Combat Camera via DVIDS

NATO War Games In Poland Get Russia's Attention

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Sgt. Jessie Bacon uses the Tactical Communications and Protective System to relay information to his squad in Fort Bliss, Texas. About 20,000 of the devices have been deployed so far. Sgt. Betty Boomer/U.S. Army hide caption

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Sgt. Betty Boomer/U.S. Army

Army's Smart Earplug Damps Explosive Noise, But Can Enhance Whispers

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Frank Rossoto Stocktrek/Getty Images

From Medical Maggots To Stench Soup, 'Grunt' Explores The Science Of Warfare

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Soldiers, officers and civilian employees attend a ceremony for the U.S. Army's annual observance of Sexual Assault Awareness and Prevention Month in March 2015 in Arlington, Virginia. According to the Pentagon, the initiative is "meant to reinforce a climate of dignity and respect founded on good order and discipline." Chip Somodevilla/Getty Images hide caption

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New Report Says Pentagon Not Doing Enough For Sexual Assault Victims

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U.S. Navy air wing captains pause on the flight deck of the aircraft carrier USS Theodore Roosevelt last September. Every day, the steam-powered catapult aboard this massive ship flings American fighter jets into the sky, on missions to target the extremist Islamic State group in Iraq and Syria. Marko Drobnjakovic/AP hide caption

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