A CONVICTED drug dealer turned informant to help foil a bomb plot at JFK International Airport.

The dealer agreed to pose as a potential terrorist among the group accused of plotting to blow up the airport, and secretly fed information to US investigators in exchange for a lighter sentence.

His surveillance trips to the New York airport with the suspects, and travels abroad to meet supporters, gave counter-terrorism agents vital information.

Four Muslim men are accused of plotting to use explosives to destroy a jet fuel pipeline that runs through residential neighbourhoods to the airport, trying to kill thousands of people and trigger an economic catastrophe.

In an indictment, one of them is quoted as saying the bombing would "cause greater destruction than the September 11 attacks".

Although the men put a great deal of time and travel into their plan, they never managed to obtain any explosives before authorities swooped.