I find it interesting that the fallout stopped at the Canadian border - I guess that invisible wall we've had up all these years really did work.
This video also reminded me of the photographer Igor Kostin, who photographed the Chernobyl disaster from a helicopter. Not only did his cameras fail while doing so, but virtually all of the film was fogged due to massive exposure to radiation in the short amount of time they were airborne (he and the pilot also got sick from radiation poisoning).
@Donald Qualls:
Agree. I think one of the consequences of governments around the world trying to cover up nuclear tests/disasters is that it really leads to public distrust and fear. Since we are exposed to radiation all the time, every day, we don't really think about our sensitivity to it until cancer or other problems rear their ugly heads, often years later, when it's hard to know exactly what the cause was.