OK. At the time I remember someone talking about a two stage missile with an increased range.
http://www.freerepublic.com/focus/news/3437887/posts?page=100#100
http://www.freerepublic.com/focus/news/3437887/posts?page=153#153
http://www.freerepublic.com/focus/news/3437887/posts?page=170#170
It would be interesting to look at the location of the explosion and compare it with the altitudes of similar airlines taking off from JFK.