Florida mailman Johnson landed gyro-copter on Wednesday . Flew 80-miles from Gettysburg to Washington D.C. and was not detected . NORAD failed to identify the single-seat craft as it flew under the radar . Homeland Security chief called for calm and no over-reaction to security breach .
Florida mailman Doug Hughes landed gyro-copter on Wednesday . Flew 80-miles from Gettysburg to Washington D.C. and was not detected . NORAD failed to identify the single-seat craft as it flew under the radar . Homeland Security chief called for calm and no over-reaction to security breach .