  – Hans Blix, former IAEA Director-General  U.S. Issued Warning
on Threat of Possible Iraqi WMD Use ShareShare this  Wade Boese
One of the unknowns leading up to and during the U.S.-led
invasion of Iraq was the U.S. response if Iraqi forces used
chemical or biological weapons against U.S. troops or allies.
Fortunately, Iraq did not carry out such an attack, sparing an
answer.  Nevertheless, the question lingers and remains relevant
because other countries hostile to the United States are known
or thought to possess chemical and biological weapons.  At
various times in the past, U.S. officials have said that the
United States might respond to a chemical or biological weapons
attack with nuclear weapons. The United States has pledged,
however, not to use nuclear weapons against countries not
possessing them that are party to the nuclear Nonproliferation
Treaty unless such a country joined a nuclear-armed country in
attacking the United States, its forces, or allies.
Proliferation experts have also debated whe