What exactly is Secretary of Defense Carter alluding to here? What a tease!

http://www.thedrive.com/the-war-zone/5394/secretary-of-defense-carter-keeps-touting-the-secret-weapons-he-has-up-his-sleeve

He is speaking at an Air Force venue that includes Area 51.

It would seem obvious that he is referring to platforms that are unknown to most members of the service, and, by extension, to the public. Moreover, these platforms are not experimental but operational … “they train here as well … “

It also would seem obvious that the Pentagon is deliberately putting this out there. But why? Perhaps to send a message to potential adversaries?

Well, as long as he remains cryptic, all we can do is wonder. Anyway, something is going on …