Bring to life America's most amazing space projects that never were, using highly illustrated step-by-step guides. The major American space programmes that carried crews are well known. From Mercury, Gemini and Apollo in the 1960s and into the 1970s, through to the 1980s Space Shuttle, which made its final flight in 2011, they have all made their mark – even the North American X-15 rocket plane that earned many of its pilots their Astronaut Wings, owing to its high-altitude capability.