friend of mine that did flight prep in the navy on a carrier went to a base in utah or nevada for some special training with about 30 others.
said he had to sign some papers just to go there, not to talk about what he saw.
he's not one for "rules" lol
said he saw it in a hangar, they were rushed past it. he said it looked like it couldn't fly for it had no real "wings" or something, had a really hard explaining what it looked like.
that was over 7 years ago.