The Apollo missions still inspire people today, decades after they took place. A fortunate side effect of the global public relations campaign is that a lot of information is publicly available ...

To test this scenario, investigators set up a duplicate of the Apollo 1 cabin inside a boilerplate command module, pressurized it with pure oxygen at 16.7 psi, and triggered an igniter.

That's the task that faced Peter Adler and Don Eyles of the MIT Instrumentation Lab who were responsible for developing the software for the Apollo Lunar Module ... a '1' would be read.