The stage is set for a chain of events that could lead to nuclear war over chemical weapons in the immediate future. If these events unfold, the trigger will be Israel, the target Iran, the nuclear aggressor the U.S.- According to the CIA, "Iran likely has already stockpiled blister, blood, choking, and probably nerve agents – and the bombs and artillery shells to deliver them – which it previously had manufactured."
- Israel bombed Iraq's Osirak nuclear reactor (which was under IAEA supervision) in 1981 just before nuclear fuel was loaded into it (to prevent nuclear fallout).
- President Bush has said that "all options are on the table" if diplomacy fails to halt Iran's nuclear program.
For more reasons (and links) see
antiwar.com