This is likely the best thread...
http://www.freerepublic.com/focus/f-news/2624216/posts
but there are quite a few more...
http://www.freerepublic.com/tag/contrail/index?tab=articles
I see stories that claim that it was an aircraft contrail and other experts claiming that it was a missile. I haven’t followed it as meticulously as I could have but hadn’t heard a definitive determination had been made.