Interesting news.. The National UFO ALERT Rating System updated New York, Michigan, Pennsylvania, and Florida to Alert 3 for highest reported in September 2013..
Keep in mind, of course, that these areas were also prime places to see the asteroids and meteors during the same month..
Also keep in mind: Drones.
I don't know what will be a "UFO" in the future. .there are so many things that a UFO could be--and most likely, many times, not an alien craft..
But the states where this is occurring is interesting nonetheless..