In the beginning of Operation Snake Eater in August 1964, two MiG pilots, patrolling the skies for any intruders in Soviet airspace (having increased security due to the events of the Virtuous Mission's aftermath), encountered a D-21 drone containing FOX agent Naked Snake and attempted to intercept it. However, its entry speed exceeded that of the MiG aircraft, forcing them to let it enter Tselinoyarsk. Both pilots were born some time between 1924 and 1934.