The word "missing" in combination with "nuclear" can never be a good thing. It's kind of like when Russia lost a bunch of suitcase nukes. Yay for them. Anyway:
CNN said:
"It would be very difficult to remove this material from the site without somebody knowing about it," Sheehan said. "It would set off radiation monitors."
Which is obviously why they lost it. Go America.
"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram