Colliding Satellites: More Space Junk in Exactly the Wrong Place
By David Wright, Union of Concerned Scientists

Space Debris: From Nuisance to Nightmare By Mike Moore

Space Junk
Past Nuclear Space Accidents
In Search of Cosmos 954 - January 20 2006
Nuclear incidents in space - March 15 2003
Nuclear Powered Space Missions - Past and Future
Effects of Plutonium Contamination
"No Safe Dose for Plutonium Radiation"