[LukeL]

A gamma knife machine will have about 6,000 curies of cobalt 60, there are also many other sources of radioactive material in every major hospital. Get enough of the waste and pack it into a bomb the size of the one at Oklahoma City and you could contaminate a huge area of a city.

While very few would die, the psychological impact would be huge

[joe fonebone]

OK........go buy one, and tell me how it goes...I watch and bid on military surplus and government surplus all the time...you can bid on this exact kind of crap.....supply the necessary paperwork, and you will soon find out that it is not possible....same with a new or used one on the open market...tell me what you find out...