Sunset shots of S-131. S-131 launched August 10, 1965. The flight was a success. Notes on the mission remark that the mission demonstrated the fourth-stage interchangeability and air transport demonstration. It was the first flight of the Castor IIA, FW4-S, 75 KS spin motors, Vega Beacon, Autodestruct Module, Dogleg, Transition "E", Ignition monitor and electrostatic experiment.
