The hunt for biological, chemical and nuclear weapons in Iraq has come to an end nearly two years after President Bush ordered U.S. troops to disarm Saddam Hussein. The top CIA weapons hunter is home, and analysts are back at Langley. Four months after Charles A. Duelfer, who led the weapons hunt in 2004, submitted an interim report to Congress that contradicted nearly every prewar assertion about Iraq made by top Bush administration officials, a senior intelligence official said the findings will stand as the ISG's final conclusions and will be published this spring. The CIA declined to authorize any official involved in the weapons search to speak on the record for this story. The intelligence official offered an authoritative account of the status of the hunt on the condition of anonymity. The ISG [Iraq Study Group] has interviewed every person it could find connected to programs that ended more than 10 years ago, and every suspected site within Iraq has been fully searched, or stripped bare by insurgents and thieves, according to several people involved in the weapons hunt. Congress allotted hundreds of millions of dollars for the weapons hunt, and there has been no public accounting of the money. A spokesman for the Pentagon's Defense Intelligence Agency said the entire budget and the expenditures would remain classified.