Some of the web's biggest names have backed mass protests over internet surveillance carried out by the US National Security Agency (NSA).
The Restore the Fourth movement - referring to the US constitution's fourth amendment - said it wants to end "unconstitutional surveillance".
Reddit, Mozilla and Wordpress are among the big web names backing the action, due to take place on Thursday.
Almost 100 events have been planned across the US.
An
interactive map detailing their locations has been published.
The site quotes a line from the fourth amendment which pledges "the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures".
As well as the "real-world" protests, many influential websites plan to display messages of protest on their homepages on Thursday, co-ordinated by a group called the Internet Defence League (IDL).
