Not only are their suitcase nukes, but he swears the crater will be 20 miles in diameter. 20 miles. sigh. I pointed out photos of several kiloton atmospheric tests with soldiers closer than that watching the fireball, but he was unpersuaded.

I take his reference to suitcase nukes to be to these:
http://en.wikipedia.org/wiki/Suitcase_nuke

But no way a 20-mile crater. _Crater_ of 20 miles. C'est la vie.