a) April 9, 1962
b) April 9, 1957
c) April 9, 1959
d) April 9, 1958
The National Aeronautics and Space Administration (NASA) introduced America’s first astronauts on April 9, 1959. The astronauts were all military test pilots, carefully selected from a group of 32 candidates to take part in America’s first manned space program, Project Mercury.