Two newly discovered letters provide startling proof that the recent bioterrorist attack on ENQUIRER headquarters originated in Iraq!

An exclusive ENQUIRER investigation has also found that World Trade center hijacker Mohamed Atta and other terrorists received anthrax antibiotics and preventative vaccinations in the 18 months prior to the September 11 carnage.

The issue that goes on sale Friday reveals the contents of the letters, sent from Iraq beginning in July — and the sinister intent behind them … Atta’s top-secret meetings with Iraqi agents in Spain and Germany, where investigators believe he took possession of anthrax and instructions on its use … and much more.