The Mercury Seven were Alan Shepard, Gus Grissom, Gordon Cooper, Wally Schirra, Deke Slayton, John Glenn, and Scott Carpenter.
The Mercury Seven were Alan Shepard, Gus Grissom, Gordon Cooper, Wally Schirra, Deke Slayton, John Glenn, and Scott Carpenter.
Iirc, with the Apollo 1 capsule, it wasn’t just the O2 environment that was dangerous; the hatch opened inward, so it was impossible to open when the inside was pressurized. Rest in peace Gus, Ed, and Roger.