It was about one in the morning, four hours after an explosion tore through the Apollo 13 spacecraft, when Ed Smylie realized they had to do something about the carbon dioxide.

NASA engineer Ed Smylie, who led carbon dioxide fix on Apollo 13, dies at 95

Source: space
Source Link: https://www.space.com/space-exploration/apollo/nasa-engineer-ed-smylie-who-led-carbon-dioxide-fix-on-apollo-13-dies-at-95