Some major web site will go dark for one minute later this morning as a national moment of silence for the victims of last week's Connecticut school shooting.

More than 100,000 people and sites have pledged to participate on Causes.com.

People and companies are also spreading the word by tweeting with the hashtag moment for Sandy Hook.

Any site that wants to participate Friday can do so on it's own, or embed an official badge with a green ribbon on it's site.

To do that, go to webmomentofsilence.org to signup.