Kevin Ryan was a site manager for a division of Underwriters Laboratory (UL). In 2003 he began to question the validity of the 9/11 investigation conducted by UL and the US National Institute for Standards and Technology (NIST). He lost his position at UL for making his suspicions public.
"A little before October 5th, Dick Cheney, the vice president, met with a
bunch of Republican senators and said 'You know I don't like the fact
that this Patriot Act is taking too long to go through Congress. It's
going too slowly. I want it passed. Let's try to get it through by
October 5th'… Well, guess what? It wasn't passed by October 5th, and the
two guys most responsible for holding it up: [senators] Daschle and
Leahy. So then guess what? Somewhere between October 6th, the day after
that deadline, and October 9th, two anthrax letters were sent to, guess
who? — Daschle and Leahy"— Dr. Graeme MacQueen.