David Muir is an American news anchor. Muir is anchor of World News Saturday and a co-anchor of Primetime and a correspondent for ABC News based in New York. Muir reports for "World News with Charles Gibson," "Good Morning America," "Nightline," and other ABC News broadcasts. He is also a substitute anchor on "Good Morning America" and the weekend editions, and frequently anchors the "World News" webcast. Wikipedia
The definitive Wikipedia entry for David Muir. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/David_Muir