The second wave of combat helicopters of the 1st Air Cavalry Division fly over an RTO and his commander on an isolated landing zone during Operation Pershing, a search and destroy mission on the Bong Son Plain and An Lao Valley of South Vietnam, during the Vietnam War. The two American soldiers are waiting for the second wave to come in. (Photo by Patrick Christain/Getty Images)
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January 21st, 2019
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