http://grin.hq.nasa.gov/IMAGES/SMALL/GPN-2000-000227.jpg
http://www.dfrc.nasa.gov/gallery/photo/X-24/Small/ECN-3659.jpg
http://www-pao.ksc.nasa.gov/spacetech/bckup/stc3.htm
http://spaceresearch.nasa.gov/general_info/art.html#bis
http://carambola.usc.edu/research/SOFBALL2quickie.html

Kim Dismukes NASA/JSC (Johnson Space Center) NASA, 1/12/04
http://spaceflight.nasa.gov/spacenews/factsheets/index.html