ABC Anchor Charlie Gibson to Step Down, Diane Sawyer to Replace Him

Diane Sawyer will succeed her friend and former partner Charlie Gibson as the anchor of ABC’s “World News” in January, making her the second woman to assume the prestigious chair at a network newscast.

The move, announced Wednesday by ABC, will leave a sizable void at “Good Morning America,” where Sawyer’s star power will be hard to replace.

Gibson, who left “GMA” for the eveni...