THey tried the cyanide thing in the first WTC bombing but it didn't work. The cyanide, when added to an acid like tomato juice or vinegar, will produce gas. Not good to breathe, of course.
As for the reference to suffocation by Saddam, his sentence referred to what the US would do the the world- we would pull the world into a pit where some would suffocate if we weren't stopped- it didn't refer to people suffocating us.
Sounds good...and it would fit with the previous text. Thanks.