Step 1: Establish a propaganda office cut-out in the middle of the intelligence community...
The Office of Special Plans
"According to former Bush officials, all defence and intelligence sources, senior administration figures created a shadow agency of Pentagon analysts staffed mainly by ideological amateurs to compete with the CIA and its military counterpart, the Defense Intelligence Agency.
The ideologically driven network functioned like a shadow government, much of it off the official payroll and beyond congressional oversight. But it proved powerful enough to prevail in a struggle with the State Department and the CIA by establishing a justification for war.
... The president's most trusted adviser, Mr Cheney, was at the shadow network's sharp end. He made several trips to the CIA in Langley, Virginia, to demand a more "forward-leaning" interpretation of the threat posed by Saddam. When he was not there to make his influence felt, his chief of staff, Lewis "Scooter" Libby, was. Such hands-on involvement in the processing of intelligence data was unprecedented for a vice-president in recent times, and it put pressure on CIA officials to come up with the appropriate results.
Another frequent visitor was Newt Gingrich, the former Republican party leader who resurfaced after September 11 as a Pentagon "consultant" and a member of its unpaid defence advisory board, with influence far beyond his official title.
... How's that working for ya?