From Bearing Arms:

The Virginia Citizens Defense League brought the legal claim and asserted $13 million in damages after Under the Gun premiered at the Sundance Film Festival with a controversial scene. Couric asks members of the group, “If there are no background checks for gun purchasers, how do you prevent felons or terrorists from purchasing a gun?”What followed was nine seconds of silence, which the plaintiffs alleged amounted to “manipulated footage falsely inform[ing] viewers that the VCDL members had been stumped and had no basis for their position on background checks.”