One rule to follow in hunting secret airplanes: Avoid cows. The highways that border Area 51, the U.S. Air Force's secure flight-test base in Nevada, are fence-free, and cows are poor judges of distance-and they are stealthy. As locals say, "They got tan ones for the day and black for night." I'm a cautious driver and never had a close call, but it's easy to see how you could get in trouble there at 70 mph.
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