just stumbled across this
http://news.cnet.com/8301-11386_3-57501134-76/the-speech-nixon-had-prepped-for-an-apollo-11-disaster/One historical tidbit worth another look in the aftermath of astronaut Neil Armstrong' death on Saturday at the age of 82: The text of the speech President Richard Nixon had his staff prepare in the event of a disaster befalling Armstrong's Apollo 11 mission...
The thought of being trapped on the moon must have been terrifying, and the fact that nixon had a speech for that eventuality means it was a real danger