"In May 7, 1994, a black helicopter chased a teenage boy for forty-five minutes in Harrahan, Louisiana. Unable to run any further, the terrified boy explained that the occupants descended from the vehicle and pointed weapons at him. To this day, the boy has no idea why he was targeted by the helicopter, or why, mysteriously, they let him go. One week later, people traveling in a car near Washington had a similar experience when they too were pursued by the helicopter. Unable to escape, they witnessed men in black uniforms coming down from a rope ladder bearing weapons. However, the drivers were let off free, much to their confusion. Black helicopters feature much in UFO-lore and while there are simple explanations for some appearances, others (such as the two above) remain unsolved." - 10 More Enigmas That Defy Explanation, 14 Jan 2010.