First, a sincere virtual hug to the city of Boston and the state of Massachusetts, and especially to those affected in any way by today's horrific events at the Boston Marathon on Patriot's Day. It's a tragic day for the city, the state, and our country, and we'd like to say a special thank you to all those who helped on site and exhibited bravery in the face of chaos.
Now, to more trivial matters. In light of the events in Boston, several networks are altering their schedules, extending tonight's news broadcasts possibly into primetime programming. Currently, ABC, NBC, and CBS will air one-hour broadcasts of their normal nightly news programs. NBC will air a special report with Brian Williams at 10pm, preempting a new episode of Revolution, according to the official Twitter feed of NBC Nightly News.
According to TV Line, CBS plans to air its primetime lineup as scheduled—barring any major developments, I'm sure—and Fox, NBC, and ABC are still haven't decided whether to change their primetime blocks. On cable, expect all the major news networks to run coverage on Boston all night. Many morning news shows have already mobilized to air special editions of their programs on location from Boston tomorrow.
We'll update this story as we get more details.