The terror attacks in Paris have forced the broadcast networks to make changes to their lineups, with both ABC News and NBC News airing live editions of 20/20 and Dateline NBC tonight at 10 p.m. ET, both devoted to live coverage of the Paris attacks.
David Muir and Elizabeth Vargas will anchor 20/20, and Lester Holt will anchor Dateline.
NBC has also announced that Matt Lauer and Savannah Guthrie will anchor a special edition of Today Saturday morning from New York, with Erica Hill reporting from Paris.
CBS News continues to provide live, streaming coverage of the Paris attacks via CBSN.