This is what Dr. Steven Greer has said about this rash of most recent UAL sightings. These are crafts that the US(and other countries) have been reverse engineering Alien craft ever since the 1940s.
That the corporations and entities that have these crafts are not necessarily part of the US Defense Department. Although many were originally financed by the US Black Budgets. Companies like McDonald Douglas and Lockeed Martin among others have been building anti gravity vehicles for almost 70 years.
FYI, there is a 16 part interview of him I have have been watching recently on YouTube. He has also been on several different podcasts in the last six months. He also wrote several of the questions asked by Congressmen/women that they asked at last weeks hearing.
SHhhhh.... you will interrupt the sleep-walking that goes on here when you get away from the world political. No one here knows about Antartica or how we went to the moon in the 50’s or any of that. So don’t rock the boat.