The Bush administration distorted intelligence and presented conjecture as evidence to justify a US invasion of Iraq, said Greg Thielmann, who served as director of the strategic, proliferation, and military issues office in the U.S. State Department's Bureau of Intelligence and Research during the months before the war. "What disturbs me deeply is what I think are the disingenuous statements made from the very top about what the intelligence did say," said Thielmann. "The area of distortion was greatest in the nuclear field."