The BBC's Steve Kingstone in Washington says the undercover agent was reportedly given an ambitious task by Saudi intelligence - to convince AQAP that he wanted to blow up himself and a US-bound aircraft.
British naval intelligence worked to convince Langsdorff that vastly superior forces were concentrating to destroy his ship, if he attempted to break out of the harbour.
In the months preceding D-Day, Pujol sent hundreds of messages to his superiors in Madrid, messages specially prepared by the British intelligence service to convince the Germans that the attack would come in July at Calais.
While the intelligence was sufficient to convince most insiders across the world that Saddam had powerful weapons, he could and should have probed the "45 minutes" thesis more on WMDs and given primacy to his moral case for war over WMDs.
This enabled him to gather intelligence, and also to convince the Hessians that the Continental Army was in such a low state of morale that they would not attack Trenton.
What better way to do this than to have some of the verbal cachet of "intelligence" rub off on these humdrum abilities, yanking them up the value chain?However, by spurring a cottage-industry of intelligence-mongers out to convince everybody that they are intelligent, in one way or another, he in effect achieved the opposite.
According to Mr Simmons, as well as reassuring residents, this style of community policing improves intelligence-gathering and helps to convince witnesses to come forward, improving the conviction rate for gang leaders.
The case against allegations that intelligence had been 'sexed up' to convince the country of the need to back war against Saddam Hussein.
Another technique for gathering intelligence on campaigners has been to convince activists to become paid informants and pass on details of future protests and prominent campaigners.
Some 4,500 ships were secretly organised and 156,000 troops landed or parachuted onto French soil backed by an amazing intelligence operation setting up decoys to convince the Germans that the real invasion would be launched elsewhere.
In a series of interviews before his two-day trial, Major Bunel admitted that he had been in contact with a Yugoslav officer but said that he was acting on orders from French intelligence officers who were hoping to convince the Yugoslav president, Slobodan Milosevic, that the threat of NATO strikes was real.
