Charles Gibson Leaving ABC World News

Since the late Peter Jennings retired because of lung cancer, ABC World News has gone through several successors.

And it’ll soon have another one.

Anchor Charles Gibson says he’ll retire at the end of the year.

He told his colleagues in New York this morning, saying it hadn’t been an easy decision but it had been on his mind for years.

He originally wanted to retire at the end of 2007.

But he had to shelve those plans in 2006 because one of Jennings’ immediate successors, Bob Woodruff, suffered horrific injuries on assignment in Iraq and the other, Elizabeth Vargas, became pregnant.

Diane Sawyer will replace Gibson on ABC World News.

This will make her the 2nd woman to regularly solo-anchor a network evening newscast.

Katie Couric has done that on the CBS Evening News for the last 3 years.