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Those low-flying helicopters that have been hovering over Manhattan today? They could be connected to a movie shoot last week that involved helicopters. But they could also be up to something else. Either way, though, the NYPD would like you to know they they're totally cool with it and it's all above board, so don't freak out and call 911, 311 or whatever hotline you're technically supposed to call in cases of mysterious, low-flying helicopters. [NYT]