Andy Deck is a New York based software artist and Internet activist focused on production of web sites where visitors can collaborate in a creative manner.

His site AntiWar404 catalogs the various pro-peace and anti-war initiatives that have gone offline since the rise of the Web in the 1990s. There are thousands of projects that were started in opposition to wars in Iraq, Yugoslavia, Afghanistan, and elsewhere, but these online media projects have tended to be unfunded and temporary....Not surprisingly, many of the projects have disappeared, like old Web documents coded missing by the Error 404 - Document Not Found message.

AntiWar404 records some of the fading history of this period by describing the former contents of missing sites, or linking some that were reconstructed. Visitors can also submit or describe such sites.