Diane Sawyer will step down as anchor of ABC World News. In an announcement this morning (Wednesday), the network announced that, effective September 2nd, she'll be replaced by David Muir, who'd anchored weekend editions of the broadcast.

The 68-year-old Sawyer will remain at ABC as leader of an investigative reporting team, anchoring prime-time specials and conducting high-profile interviews.

The change at the anchor desk means that, as of this fall, all three traditional network evening newscasts will again be anchored by men. Quite a contrast to just three years ago, when, along with Sawyer on ABC, CBS's anchor was Katie Couric.

Though he wasn't involved in this shuffle, ABC also handed out a perk to Good Morning America anchor George Stephanopoulos. He adds the title of Chief Anchor, handling special reports and breaking news, while continuing to host the top-rated morning program as well as its' Sunday morning DC panel show This Week.

photo: sxc