Title: Foothold in the Heavens
Subjects: Astrophysics, Engineering, Astronomy, Astronautics, United States, Maan, Ruimtevaart, Exploration, History, Space flight, United States. National Aeronautics and Space Administration, Space race, Outer space, exploration, Astronautics, history, Space Sciences Extraterrestrial Physics, Popular Science in Astronomy, Aerospace Technology and Astronautics