If you're planning to commit an act of terror in the US and want to be left alone by the FBI, make sure your target is something, or someone, that the US government doesn't like or care about.

Consider these two terrorist plots.

Just last week, on Jan. 14, the FBI announced that it had arrested Christopher Lee Cornell, a guy in Ohio the bureau alleges had plans to attack Congress with pipe bombs and guns. Apparently acting alone, Cornell is alleged by the FBI to have "researched how to make pipe bombs" (there's no indication that he actually made or tested any actual bombs), and to have purchased a pair of M-15 semi-automatic rifles and ammunition. How Cornell, who is described as a self-styled "jihadist," but one with no real connection with foreign Islamic militants, planned to get past the metal detectors and tight security at the Capitol Building in Washington, was not explained, and probably was not known to Cornell himself. It also appears that the FBI was watching Cornell all along, and no doubt encouraging him too, as it was working with a snitch — a man facing prosecution who was in communication with Cornell and may well have been a provocateur, given the Bureau's prior history of luring vulnerable people into planning terror acts which it then busts.