Neil Armstrong was the first man to walk on the Moon alongside astronaut Buzz Aldrin on July 20, 1969. The Apollo 11 Commander was often dubbed a “reluctant hero” who cherished his privacy and shied away from the spotlight. The astronaut was also renowned for his dedication to his work and nerves of steel in dangerous situations – a trait that saved his life on more than one occasion. However, according to Commander Armstrong’s sister, June Armstrong, there is a very tragic reason behind the astronaut's unwavering dedication to his work.