"Yukhnov mid-air collision" . "1969 Yukhnov mid-air collision" . "Aeroflot Flight 831
and Soviet Air Force An-12" . . . . "The transport collided with an Aeroflot Ilyushin Il-14M over Yukhnov" . . . . . . . . . . . . . . . "collided" . "Aeroflot Flight 831/ Soviet Air Force flight" . "In the Soviet Union, 120 people were killed" . . . . . "'''Flight 831'''" . . "1969 Yukhnov mid-air collision" . .