5 maio 1961 ano - Alan Shepard is launched on Freedom 7 on a sub-orbital spaceflight aboard a Mercury-Redstone rocket, and becomes the first American in outer space. The flight lasts 15 minutes 22 seconds, and reaches an apogee of 187.42 kilometres (116.46 mi), and a maximum speed of 8,277 kilometres per hour (5,143 mph) (Mach 6.94).