When Rip Cantrell, a seismic survey worker in the Sahara, spots a glint of reflected light in the distance, he investigates-and finds a piece of metal apparently entombed in the sandstone. Before long, Rip and his colleagues uncover a flying saucer that has been resting there for 140,000 years. Their discovery doesn't remain a secret for long. The U.S. airforce sends a UFO investigation team, which arrives just minutes before a team sent by an Australian...