Rachel Maddow re-caps the story of a member of the right-wing fringe group American Grand Jury who was arrested while attempting to make an armed citizen's arrest in a courthouse. James Cavanaugh, a former ATF Special Agent, joins to explain the difference between the dangerous fringe and the just-plain-ridiculous fringe.

This video is from MSNBC's The Rachel Maddow Show, broadcast May 6, 2010.