CH-47 Chinook and 2 AH-64 Apache Longbows painted in stark white, my first impulse was, holy shit, that must be Air Force One, because 'Air Force One' isn't technically the 747 the President flies around on (though it often is) but rather whatever airborne vehicle the President happens to be flying in at that particular moment.
Since it's not practical to fly a 747 into Manhattan, I thought we had a chance here of an incidental Presidential path-crossing, figuring somebody important must be in the Chinook to require a dual-Apache escort out to Newark.
Unfortunately, the President's daily schedule is remarkably easy to come by with some light Googling and multiple sources (including this one) agree that he was probably in Chicago at the time, thus debunking my theory. But still, this was an impressive display of air superiority to witness on a fairly routine commute and thus merits inclusion in my continuous documentation of life's little oddities.
So with that, if anyone has any ideas who this may have been please speak up. My next best guess is Mikhail Prokhorov, aka that wild Russian billionaire who recently bought the New Jersey Nets.