At the height of the Cold War, on the night of Dec. 12, 1966, the residents of McKinney were startled by the sound of an explosion and many locals converged on this hill to find a large fiery crater and the wreckage of an Air Force B-58. All three crew members perished, and the official cause was never released to the public. The fallen officers were the pilot, Major Richard F. Blakeslee, the navigator, Major Floyd E. Acker, and the defense systems operator, Captain C. Dale Lunt. They were returning from a training mission to Bunker Hill Air Force Base, Ind. The B-58 was the first supersonic bomber and a vital weapons system of the Strategic Air Command.