There is another article I’m trying to find but this is a good start. (Patreon)

Opinion | Terrorist Plots, Hatched by the F.B.I.

When an Oregon college student, Mohamed Osman Mohamud, thought of using a car bomb to attack a festive Christmas-tree lighting ceremony in Portland, the F.B.I. provided a van loaded with six 55-gallon drums of "inert material," harmless blasting caps, a detonator cord and a gallon of diesel fuel to make the van smell flammable.