Elizabeth Vargas and Bob Woodruff will co-anchor World News Tonight beginning Tuesday, January 3, ABC News announced this morning. Beginning that day, ABC will broadcast a live edition of WNT to the West Coast each night.

"Elizabeth and Bob together will be the anchors for this new broadcast and digital age of World News Tonight," David Westin said in the press release. "Their experience as journalists, their familiarity to our audiences, and their commitment to gathering and delivering the news anywhere, anytime and in every way make them the right team to take us forward for the next generation."

Vargas will remain co-anchor of 20/20. Woodruff, I assume, won't continue to anchor weekend editions of the newscast.

> Update: 11am: ABCNews.com has posted the press release...