Multiple scientists tied to U.S. military and defense research have disappeared or died, prompting questions about whether a ...

A top U. S. Air Force general linked to the military's alleged research on UFOs has gone missing – and experts are calling his mysterious disappearance a "grave national security crisis," RadarOnline.

Steven Garcia left his Albuquerque, New Mexico, home on foot last August.

Streetlights shaped like alien heads line the roads of Roswell, New Mexico, where murals of flying saucers streak across storefronts and tourists pose beside statues of little green men.Related video ...