 Bergman later covered the missions of NASA's unmanned space probes, notably the Viking and Voyager programs.He also covered the Space Shuttle program from its first flights through the 1986 Challenger disaster.After the Apollo 1 fire took the lives of astronauts Gus Grissom, Ed White and Roger B. Chaffee on January 27, 1967, Bergman discovered and revealed the existence of a NASA document that became known as the Phillips Report, which led to a minor scandal complicating NASA's recovery from the fire, and causing administrator James E. Webb much embarrassment.