In past times there have been quite a few very clear photos published from various sources, including government sources. Just none from this current program of released material.
Some of the really good pictures might even be real.
But the current release program provides nothing of any consequence.
Let's see photos and videos of crashed vehicle parts or even bodies of extraterrestrial biological entities that are supposedly in government custody.
Or let's see videos of laboratory projects working on reverse engineering of power and propulsion systems used by the supposed vehicles. Even better, let's see some demonstrations of prototypes.
They don't have any of that stuff? Then why bother. People have been seeing strange things flying around in the sky for thousands of years. Something is out there. It does not seem to be very concerned with us.
And if we cannot do anything about it or learn anything from it, then we might as well ignore it.
My guess is they have hard evidence, but no interest whatsoever in divulging it to the public. Congress has already admitted that they can’t force compliance in this matter. Look at some videos made by Time Berchett. He has become very frustrated by this.