Gus Grissom
The deaths of astronauts Gus Grissom, Ed White, and Roger B. Chaffee in the Apollo 1 fire on 27 January 1967 put a temporary hold on the U.S. space program, but afterward progress was steady, with the Apollo 8 crew (Frank Borman, Jim Lovell, William Anders) being the first manned mission to orbit another celestial body (the Moon) during Christmas of 1968.