Washington Evening Journal in Washington, Iowa

NASA to mix nitrogen in Apollo cabin to cut fire risk

NASA announced a 60 percent oxygen and 40 percent nitrogen cabin mix for ground operations on the first manned Apollo flight to reduce fire danger after a disastrous pure-oxygen test. The change does not alter in-flight pure-oxygen life support, and astronauts Schirra Eisele and Cunningham will fly in October with suits at higher pressure to prevent contamination.