Flight Director's Loop during the Apollo 13 Mission

This is great training material. Listen to the astronauts and flight controllers manage a massive multiple system failure. This system failure was on a scale that no one had trained for because it was assumed if so many systems were lost, the cause would have to be so catastrophic that the crew and vehicle would have been instantly destroyed. Listen to the calmness and professionalism and the attention to detail and communication.

https://www.youtube.com/watch?v=KWfnY9cRXO4