"Mariner 5, our Venus probe space-vehicle, sweeps by the planet and sends back data differing from Soviet findings. Future data will check out radioactivity and whether man can land safely on Venus." TLS scientists sitting in chairs at Jet Propulsion Laboratory briefing. Various shots of a Mariner 5 space probe model. MS/MCUs miniature Mariner 5 model on probe course around Venus; it shakes and sputters as it negotiates along a representation of one of planet's orbits.