What happened to Apollo 1?
The training session had been plagued with problems, and Grissom was furious at the multiple problems the craft had. After the fire, the entire craft design was overhauled and the extra safety features quite likely preserved the Apollo 13 mission when the cabins became saturated in condensation, and it is thought the attention to insulating the wiring after the Apollo 1 fire prevented serious problems on Apollo13.
