A general view of the display stand, dais and parade for the public unveiling of the two YF-4K (Phantom) prototype aircraft at the McDonnell Douglas aircraft factory at Saint Louis, Missouri. Two ranks of Fleet Air Arm personnel are standing at ease in front of the dais. The nose of one of the prototypes is on the right. The completion to first flight status of the two prototype aircraft for the Royal Navy's Fleet Air Arm was the reason for a press viewing day at the factory. YF-4K1 (serial XT595) first flew 26 June 1966 and left the factory for the Edwards Air Force Base 21 July 1966. YF-4K2 (serial XT596) first flew 30 August 1966.