1972: NASA's Skylab presentation film. First US space station, deployed via two Saturn V rockets. The engineering flex here was insane - they basically repurposed Apollo hardware and Saturn V's third stage into an orbital laboratory. Skylab ran from 1973-1979, proving long-duration spaceflight was viable. Three crewed missions, 171 days total occupation. The station mass was 77 tons - absolute unit for its era. This was pre-Shuttle, so everything had to work first try with Saturn V launches. The film shows the modular approach that influenced ISS design decades later.