In preparation for Super Bowl XLVIII, authorities drilled with military aircraft this week what they would do in the event an airplane violated the no-fly zone above MetLife Stadium Sunday, former CBS News senior correspondent John Miller, now the NYPD's deputy commissioner of intelligence, said on "CBS This Morning" Friday.
Miller told Norah O'Donnell and Charlie Rose that authorities conducted the drill at 4:30 a.m. Thursday.
"If you had been up, you would have seen a couple of military jets - F-15s - streaking across the skies of New York City chasing a plane," said Miller. "They actually drill this when everybody's asleep so nobody sees anything that would alarm them in broad daylight, but the night before last they had the big chase."
He said it wasn't the first time authorities had practiced for such a scenario.
"It's built into the plan," Miller said, adding that authorities had similar plans during last year's Super Bowl in New Orleans.
There aren't any known, credible threats directed against the game, Miller said.
"That said, in the normal course of business, we have a threat stream - that's threats that come in by mail, anonymous calls, the same thing you get every day but some of it will mention the game or the venue - so, you know, you run all these down," said Miller. "We have a team of people that's been beefed up for this that works through that. The FBI has a threat squad that's made up of agents and detectives that works with us on that."
With the threats and leads that come in through other investigations, Miller said he hasn't learned of anything that keeps him up at night.
"You always are worried about what is the thing that is not in the threat pile or in the lead stream, and if you look at the Boston Marathon bombing model, where you have two people who aren't communicating with al Qaeda, who aren't part of a large group - they're just talking to each other - that's the kind of thing that you say, 'How are we going to catch that,'" said Miller, "and we have a whole set of systems for that too."
For the complete interview with John Miller, watch the video in the player above.