NASA marks anniversary of Apollo deaths

Exactly 40 years later, the three Apollo astronauts who were killed in that flash fire were remembered Saturday for paving the way for later astronauts to be able to travel to the moon. The deaths of Virgil "Gus" Grissom, Ed White and Roger Chaffee forced NASA to take pause in its space race with the Soviet Union and make design and safety changes that were critical to the agency's later successes.