I felt the wall of the tunnel shiver. The master
alarm squealed through my earphones. Almost simultaneously, Jack yelled
down to me that there was a warning light on. Fleeting but spectacular
sights snapped into ans out of view, the snow, the shower of debris, the
moon, looming close and big, the dazzling sunshine for once unfiltered
by layers of air. The last twelve hours before re-entry were particular
bone-chilling. During this period, I had to go up in to command module.
Even after the fiery re-entry splashing down in 81o water in south pacific, we could still see our frosty breath inside the command module.
The word 'Command Module' used twice in the given passage indicates perhaps that it deals with