Here’s an interview of Noam Chomsky and Christopher Hitchens from back in ’92.
http://www.youtube.com/watch?v=9ysQPtAOJjY&mode=related&search=
Hitchens wrote a defense of Chomsky…
http://www.zmag.org/chomsky/other/85-hitchens.html
…But after 9/11 the two crossed swords:
http://www.thenation.com/doc/20011008/hitchens
http://www.counterpunch.org/chomskyhitch.html