At least WE don't have them. They may be hidden in the bowels of the NSA, DIA or by the intelligence agencies run by the Vatican (P42). There are plenty of military and scientific witnesses coming forward who have worked on these projects.

Right now the capabilities of the ufos seem beyond our comprehension but we are still thinking with 20th century minds. I'd like to see the US release some of it's files, but I doubt they will, at least the more spectacular ones. Often what is learned is not digested well, and even after years of trying, most people prefer to keep it carpmentalized, which is where it is today. It's safer that way I think.

>"A lunar lander type vehicle with hieroglyphs? For whom to read?"

If you were an alien and you wanted to tease us or show us something, wouldn't you create a model we'd recognize as something similiar? Either that, or they are similiar to us in some regards as it relates to travel and identification.