Back in 2007, I wrote an essay, “Portrait of the Modern Terrorist as an Idiot,” where I said:
The JFK Airport plotters seem to have been egged on by an informant, a twice-convicted drug dealer. An FBI informant almost certainly pushed the Fort Dix plotters to do things they wouldn’t have ordinarily done. The Miami gang’s Sears Tower plot was suggested by an FBI undercover agent who infiltrated the group. And in 2003, it took an elaborate sting operation involving three countries to arrest an arms dealer for selling a surface-to-air missile to an ostensible Muslim extremist. Entrapment is a very real possibility in all of these cases.
Over on Salon, Stephan Salisbury has an essay on FBI entrapment and domestic terrorism plots. It’s well worth reading.