Family members, reunited after fleeing Kosovo, pass 2-year-old Agim Shala through the barbed wire fence into the hands of his grandparents at a camp in Albania. The photo was taken on March 3, 1999. Carol Guzy/The Washington Post/Getty Images hide caption

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U.S. Secretary of Defense Ash Carter shakes hands with Vietnam's General Secretary Nguyen Phu Trong at the Presidential Palace in Hanoi, Vietnam, on June 1. Trong will meet with President Obama in the White House on Tuesday. Luong Thai Linh/EPA/Landov hide caption

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Yvette Benavidez Garcia and her husband, Rene, dropped by the StoryCorps studios to reminisce about Yvette's father, Roy, a Medal of Honor recipient whose daring rescue mission in Vietnam cast ripples into his later life as a father. StoryCorps hide caption

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Sun Jianguo (left), from the Chinese People's Liberation Army Navy, chats with U.S. Secretary of Defense Ashton Carter in May during the ministerial luncheon at the 14th Asia Security Summit in Singapore. Each country has grown increasingly wary of the other's actions and interests in the South China Sea. Roslan Rahman/AFP/Getty Images hide caption

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Members of the 9th U.S. Marine Expeditionary Force go ashore at Danang, South Vietnam, on March 8, 1965. Assigned to beef up defense of an air base, they were the first U.S. combat troops deployed in the Vietnam War. AP hide caption

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Brig. Gen. Viet Luong of the 1st Cavalry Division came to the United States in the 1970s after his family fled Vietnam in the waning days of the war there. He's now leading the effort to train Afghan soldiers to fight the Taliban. David Gilkey/NPR hide caption

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On April 4, 1975, a Lockheed C-5A Galaxy participating in Operation Babylift crashed on approach during an emergency landing at Tan Son Nhut Air Base, South Vietnam. Courtesy of Bud Traynor hide caption

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The National Guard Bureau commissioned this painting, "Indiana Rangers: The Army Guard in Vietnam," as part of its series of paintings depicting significant moments in Guard history. It represents members of the Company D, 151st Infantry division — one of a few Guard units deployed to Vietnam — on duty in the jungle Mort Kunstler/National Guard Bureau hide caption

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Yes, those are people: A still image from a drone video filmed inside the world's largest cave shows cavers standing beneath one of two large skylights in Vietnam's Hang Son Doong. Ryan Deboodt /Vimeo hide caption

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A U.S. Air Force C-123 sprays herbicides on dense jungle beside a South Vietnamese highway on May 18, 1966. This aircraft is the last in a formation of three. Spray from the other two planes can be seen ahead. U.S. Air Force via AP hide caption

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