Susan Helms, a Chi Omega Special Initiate, took her Chi Omega pin with her on a trip to the Space Station and upon return to earth, donated it to Pi Gamma Chapter (Univ. of New Mexico), her initiating chapter. This badge was "lost/stolen" during a fraternity prank and never recovered.
Makes me mad each time I think about it!
http://www.jsc.nasa.gov/Bios/htmlbios/helms.html