Do you think aliens in ufos have visited Earth? (And all things UFO)

I'm not sure. Has he actually broken any NDAs?
He violated the terms of his NDA the moment he acknowledge the existence of the program he was "read" into, and that is speaking from personal experience. He is no longer a government employee and he says that he wants to "blow the whistle" on UFO's, then do it! Don't say I will answer your question, but only in a SCIF!