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

itoggle caption Paul J. Richards /AFP/Getty Images

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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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

itoggle caption China Stringer Network/Reuters/Landov

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

itoggle caption Tom Bowman/NPR

A still frame taken from a YouTube video shows Marines who were later disciplined for desecrating three dead Taliban members in a 2011 incident in the southern Afghan province of Helmand. YouTube hide caption

itoggle caption YouTube

National Intelligence Director James Clapper waits for a hearing of the Senate Judiciary on Wednesday. Brendan Smialowski/AFP/Getty Images hide caption

itoggle caption Brendan Smialowski/AFP/Getty Images

As Secretary of State John Kerry spoke to the House Foreign Affairs Committee on Wednesday, "Code Pink" protesters behind him held up "bloody hands" to express their opposition to the prospect of U.S. military strikes on Syria. Jim Watson /AFP/Getty Images hide caption

itoggle caption Jim Watson /AFP/Getty Images

Downtown Cairo is plastered with huge posters of Gen. Abdel-Fattah el-Sissi, the U.S.-trained Egyptian army chief who helped overthrow President Mohammed Morsi. Amr Abdallah Dalsh/Reuters/Landov hide caption

itoggle caption Amr Abdallah Dalsh/Reuters/Landov

Concept art of the suit the Special Operations Command is trying to build. Raytheon via YouTube hide caption

itoggle caption Raytheon via YouTube

National Security Agency headquarters at Fort Meade, Md. Saul Loeb/AFP/Getty Images hide caption

itoggle caption Saul Loeb/AFP/Getty Images

Sgt. Chris Cunningham has served five tours in Afghanistan, surviving some of the most horrific fighting of the past decade. Cunningham is now working in something of a safe haven at Combat Outpost Arian in Ghazni province. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR