During what phase of the Apollo 1 mission did the fatal fire occur?

Answer

During a "plugs-out" launch rehearsal on the pad

The Apollo 1 tragedy happened on January 27, 1967, while astronauts Grissom, White, and Chaffee were undergoing a 'plugs-out' launch rehearsal inside the command module.

During what phase of the Apollo 1 mission did the fatal fire occur?

#Videos

The Biggest NASA Lie: The Fatal Flaw That Destroyed a Space Shuttle

Infamous NASA Disasters That Were Worse Than You Realize

HistoryNASAfailurespace exploration