There is a law in the US (under title 14, Section 1211 of the Code of Federal regulations, implemented on July 16, 1969) which makes it illegal for US citizens to have any contact with the extraterrestrials or their vehicles.
Flying Saucers from Outer Space was the first book to use the term "UFO".
According to some UFO aficionados, the Men in Black (MIBs) really do exist, and have been hammering on the doors of alien witnesses ever since the first appearance of flying saucers in 1947. Area51
