Lieutenant Col. Edward W. Powers, commanding officer of Marine Light Attack Helicopter Squadron 469, 3rd Marine Aircraft Wing, stands in front of the memorial during Park Semper Fi’s 10th anniversary ceremony at San Clemente, Calif., Oct. 11, 2015. The ceremony paid tribute to Marines with HMLA 469 who gave their lives during a humanitarian mission in Nepal, May 12, 2015. - Lieutenant Col. Edward W. Powers, commanding officer of Marine Light Attack Helicopter Squadron 469, 3rd Marine Aircraft Wing, stands in front of the memorial during Park Semper Fi’s 10th anniversary ceremony at San Clemente, Calif., Oct. 11, 2015. The ceremony paid tribute to Marines with HMLA 469 who gave their lives during a humanitarian mission in Nepal, May 12, 2015.