Attendees of the Vietnam Helicopter Pilots Association

Attendees of the Vietnam Helicopter Pilots Association Living Tree Memorial Dedication listen to remarks in the Memorial Amphitheater at Arlington National Cemetery, Aug. 28, 2015. A living tree, planted earlier, was dedicated to honor 5,000 Vietnam helicopter pilots and crew members who were killed during the Vietnam War. “We gather today to honor the many thousands of helicopter pilots and crew members, from all branches of service, who gave the last full measure of devotion to our nation during the Vietnam War,” Bob Hesselbein, president of VHPA, wrote in the program handed out at the ceremony. (U.S. Army photo by Rachel Larue/released)