You have to give Brian Williams credit for his the-show-must-go-on effort when his opening on last night’s NBC Nightly News was interrupted by a fire alarm inside the newscast’s new studio. Luckily for East Coast viewers, the story on the American Airlines bankruptcy called for a toss to reporter Tom Costello in Washington DC, where the alarm wasn’t a factor. Williams retaped the segment for the West Coast, which didn’t get to share in the fun.