For the first time ever, video has been shot from inside the Supreme Court while the court was in session.
The video was taken as part of a planned protest by a group supporting campaign finance reform. It's unclear how the protesters got the camera inside the court.
No electronic devices have ever been permitted in the court's public sessions, and all spectators and members of the media are screened.
At the end of the video, a protester stands up, interrupts the court and is escorted out by security.
Supreme Court spectator interrupts justices
There are only two known pictures of the court in session. Both were taken by still cameras that were smuggled inside the chamber.
OutFront: CNN Senior Legal Analyst Jeffrey Toobin.