It's not a very good article. Google his name and you can find the FBI affidavit and more information; it's a textbook "entrapment" case as the OP described.
Basically Ferdaus made statements that he supported terrorism and had some vague idea of an attack using RC airplanes, FBI agents posing as terrorists got in touch with him and coaxed him into more than just words. They gave him money which he used to buy guns, explosives, and model planes. Without FBI assistance his "plans" would likely never have gone anywhere.
