Charles Gibson, who announced he'll be stepping down
as chief anchor on ABC's World News, will be replaced by Diane Sawyer beginning next year.
"She has more than paid her dues, and it is her time," ABC News President David Westin said.
Sawyer was joined by Gibson in 1999 on Good Morning America
, then she supported Gibson for the past three years as chief anchor on ABC's World News. Sawyer was a correspondent