There is a shift from memorializing the event, Daily Variety reported.
"A year later it was too raw," CNN terrorism expert Peter Bergen said. "After five years, I think we have some perspective, but it may still be too soon."
ABC will air "Path to 9/11," dramatization of the Sept. 11 Commission Report in a four-hour miniseries Sunday, Sept. 10, and Monday, Sept. 11. Its cast of 247 includes Harvey Keitel, Shirley Douglas and Patricia Heaton.
CBS will rebroadcast "9/11," the documentary made by Gedeon and Jules Naudet and firefighter James Hanlon. An updated version will feature interviews with survivors, Variety said.
NBC will air the "Dateline" special "Flight 93," updated with additional interviews and audiotapes from the plane that crashed in Pennsylvania.
The cable-news networks will broadcast from Manhattan, showing on-site tributes, the report said. The History Channel, Discovery Channel, National Geographic Channel, A&E and Sundance also plan special programming.