“Three astronauts were killed in the Apollo 1 launch pad fire on Jan. 27, 1967.”
The term “launch pad fire” is true, but to me it is not very descriptive of what actually happened on that fatal NASA preflight test, that late afternoon at LC-34 (Launch Complex 34), Jan 27, 1967. As the only photographer for NASA, at the time specifically assigned to LC-34, including my own desk inside the blockhouse, I was only moments away from a NASA assignment to stay on over-time to take motion picture documentation of that test in progress. I was to be filming the three astronauts, (Gus Grissom, Ed White, and Roger Chaffee), up on the service structure, at the Command Module. At the last minute, I was told to scrub (cancel) my Job Order (assignment,) because they couldn’t get enough light up there. Hence, the test was not documented on film.
Here is a good description fully of what happened, from the National Geographic Encyclopedia of SPACE. Linda K. Glover with Andrew Chaikin, Patricia S. Daniels, Andrea Gianopoulos, and Jonathan T. Malay, FOREWORD BY Buzz Aldrin.
Apollo 1
On January 27, 1967, the crew intended for the first manned Apollo flight—veteran astronauts Gus Grissom and Ed White and rookie Roger Chaffee—took part in a prelaunch rehearsal for their two-week mission, which was slated for mid-February. The three astronauts were sealed onside their command module, which was pressurized with pure oxygen at 1.125 kilograms a square centimeter, slightly above atmospheric pressure. At about 6:30 p.m. EST, fire suddenly erupted inside Apollo 1. Within 20 seconds it spread throughout the cabin, creating such intense pressure that the spacecraft’s hull ruptured. Ground crews struggled to open the craft’s three-piece hatch. By the time they succeeded, many minutes had passed, and the astronauts were dead: They had been asphyxiated by toxic gases when their air hoses burned through. In the months that followed, NASA investigated the cause of the fire and redesigned the command module with fireproof materials and a new quick-opening hatch; high-pressure pure oxygen was no longer used during ground tests.