The full list is over at Mental Floss. Here’s an excerpt from the one I found most interesting, written by Richard Nixon’s Chief of Staff, in case anything went wrong with Apollo 11:
Fate has ordained that the men who went to the moon to explore in peace will stay on the moon to rest in peace.
These brave men, Neil Armstrong and Edwin Aldrin, know that there is no hope for their recovery. But they also know that there is hope for mankind in their sacrifice. These two men are laying down their lives in mankind’s most noble goal: the search for truth and understanding.