In 1984, an American Army unit engaged in this firefight as it shielded a Soviet defector who made a break across the Demilitarized Zone between North Korea and South Korea. Thirty years after the battle, one of the U.S. soldiers, Mark Deville, has finally received a Silver Star for his bravery. Courtesy of Mark Deville hide caption

itoggle caption Courtesy of Mark Deville

Gen. Martin E. Dempsey, Chairman of Joint Chiefs of Staff, in November of 2013. Paul J. Richards /AFP/Getty Images hide caption

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Former Defense Secretary Robert Gates says he didn't want to wait until Obama's term was up before releasing his memoir because the issues were too urgent. Brendan Smialowski/AFP/Getty Images hide caption

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Female Marine recruits train on the rifle range during boot camp at Parris Island, S.C., on Feb. 25. The Marine Corps said it has postponed new physical standards that would require women to do three pullups, noting that many female recruits were not yet able to do so. Scott Olson/Getty Images hide caption

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Chinese naval soldiers stand guard on China's first aircraft carrier Liaoning as it travels toward a military base in Sanya, Hainan province, in this undated picture made available on Nov. 30. China Stringer Network/Reuters/Landov hide caption

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A helicopter from the American security contractor DynCorp provides air support as members of an Afghan eradication force plow opium poppies on April 3, 2006, in the Helmand province, Afghanistan. John Moore/Getty Images hide caption

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Pfc. Katie Gorz (center) served as a squad leader during the training at Camp Geiger, N.C. Tom Bowman/NPR hide caption

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