They may know that it's getting impossible to pigeon hole or keep quiet these hushed technologies because of the internet and the increased technical sophistication of the rest of the world. Even though E-Cat is out (I truly hope it's working as it was advertised), the US doesn't want to be eclipsed by someone like that or others saying we have low energy nuclear reaction going on and it's possible by doing this. Oil would go under big time and the power infrastructure for the Nation or nations wouldn't be needed in the future because your house could have a LENR system inside. And not to mention vehicles being moved by a portable system, like cars.