Nepalese villagers wave after collecting aid dropped by an Indian helicopter in Khanigaun, Nepal. David Ramos/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

itoggle caption AP