NEW YORK (AP) -- ABC says Diane Sawyer is stepping down as its evening news anchor, to be replaced by David Muir.
The network said Sawyer will concentrate on interviews and specials. During her tenure, ABC's "World News" was a steady second to Brian Williams at NBC, although the ABC broadcast has made gains among younger viewers.
Muir is familiar to "World News" viewers as a substitute for Sawyer and has traveled around the country for his "Made in America" series.
ABC said George Stephanopoulos will take on a new role as chief anchor for live news events.
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