Book excerpt: On July 20, 1969, the world watched on televisions or listened on radios as Neil Armstrong and Buzz Aldrin took the first-ever steps on the Moon. Once considered an impossible dream, the United States created the Apollo program with one goal in mind, landing on the Moon. After many years of hard work, sacrifice, and dedication, the Apollo 11 mission made that dream a reality. Author Carl R. Green explores one of the most monumental achievements in human history.