[greenyoda]

> NASA's guidelines are not written in blood

I can think of at least three NASA missions that resulted in deaths: Apollo 1[1], and the Challenger[2] and Columbia[3] space shuttles.

[1] https://en.wikipedia.org/wiki/Apollo_1

[2] https://en.wikipedia.org/wiki/Space_Shuttle_Challenger_disas...

[3] https://en.wikipedia.org/wiki/Space_Shuttle_Columbia_disaste...

[ncmncm]

Only one of those particularly affected guidelines. After, anything that might end up in a pure oxygen atmosphere had to be non-inflammable, and very uncomfortable.