On September 11, 1973 General Pinoche overthrew President Allende of Chile in a military coupe. Both the coup and Pinoche's ensuing rule had extensive support from the Nixon and Ford administrations and the CIA, despite(?) his being a dictator running a repressive police state.
The coup itself killed 3,000, Pinoche's regime killed many many more. A death tally well beyond the trade center bombings.
http://www.gwu.edu/~nsarchiv/latin_america/chile.htm
http://www.gwu.edu/~nsarchiv/NSAEBB/NSAEBB8/nsaebb8i.htm
Or how about the union carbide accident in Bhopal? the details of this are truly horrifying, and way beyond the scale of the 9/11 plane crashes. The negligent parties are clearly known, yet no-one has ever been held accountable.
http://www.guardian.co.uk/weekend/story/0,3605,794860,00.html
Dated: 09/20/2002