Well this is an odd one. A Jordanian national with an existing PPL flying a Seneca with an MEI on board. Only the instructor survived and says the student crashed it intentionally. They went down next to a Pratt & Whitney aircraft engine factory.
http://www.cbsnews.com/news/fbi-investigating-deadly-plane-crash-east-hartford-connecticut-intentional/
Whether it turns out to be terrorism or not, I suspect the story will be divisive and not terribly good for GA.