Some of the Internet's biggest websites will go dark tomorrow to protest an anti-piracy bill that critics say will destroy the World Wide Web as we know it.
Websites like Wikipedia, user-submitted news site Reddit, the blog "Boing Boing" and the "Cheezburger" comedy network all plan to shut down.
The protest is their response to the Stop Online Piracy Act, or "SOPA.?
The bill aims to crack down on copyright infringement by restricting access to sites that fuel it.
If SOPA passes, copyright holders would be able to complain to law enforcement officials and get websites shut down.
Opponents say that could lead to Americans losing access to thousands of sites across the web.