If this object is high enough to form a contrail, it is moving at extreme speed. If it’s low enough to be a very fast jet, then it wouldn’t produce a contrail. Conclusion: despite what the newscaster say about it, t’s displaying unusual flight characteristics. Grade B.

Story Source:
http://newyork.cbslocal.com/2010/11/10/did-you-see-the-fire-in-the-nyc-sky/