Talk about some real American heroes...I have been watching Tom Hanks' slick miniseries "From The Earth To The Moon" and it's worth noting how many astronauts in the Apollo program were Michigan alums:
Gemini 4: James McDivitt, Ed White (first American to spacewalk)
Gemini 8: Dave Scott (enrolled at Michigan for one year, enrolled at West Point after that)
Apollo 9: McDivitt, Scott
Apollo 15: Scott, Al Worden, Jim Irwin
NASA flew 27 manned missions comprising 59 total seats up to and including the last landing, and 12% of those seats were filled by UM alums. A few years back Michigan ran an ad with a very tinny The Victors emerging from an orbiting Apollo 15 command module with the caption "an all-UM crew." Sweet!
Semi-OT: Apollo 13 commander Jim Lovell spoke at Tom Hanks' American Film Institute lifetime achievement award presentation. Similar to Scott, Lovell enrolled at Wisconsin for two years before being admitted to Annapolis and a street in Milwaukee is named for him. Check out the look on Hanks' face when Lovell is announced: