TV Networks Extending News Programs for Boston Bombing Suspect Manhunt

Ratings

With Thursday's late-night manhunt for remaining Boston Marathon bombing suspect Dzhokhar Tsarnaev extending into Friday afternoon, and wall-to-wall coverage blanketing the big four broadcasters and cable news, networks have already solidified plans to incorporate more news coverage into primetime.

Extended coverage starts early on ABC, with Diane Sawyeranchoring a one-hour episode of ABC World News. Sawyer has already been on ABC live throughout the morning, reporting on the Boston events from New York with Good Morning Americahost George Stephanopoulos. A special live edition of 20/20, anchored from Boston by Elizabeth Vargas, will air at 10 p.m. Later in the evening, Nightline will also be live from Boston withJuju Chang reporting.