One night, a large passenger airliner was flying en route.Marshals found a suspicious middle-aged man, he stepped forward to cross-examination, the man suddenly violent revolt, but was quickly subdued marshals.  Just when marshals handcuffed him, the man said coldly: Do not get too excited, I would have placed a bomb on the plane wing pressure, as long as the plane fell from an altitude of 10,000 meters to 2000 meters altitude, the aircraft will be blown to pieces by bombs!  After examination, there are really two bombs under the wings!How to do?At 10,000 meters altitude impossible to dismantle a bomb, but not landing aircraft can not always.Mangjiang marshals told the news to the captain, the captain thought for a moment, turned decisively the course.  An hour later, the plane landed safely at an airport, crew safe and sound.The man stunned, he can not think, how will sensitive pressure bomb did not explode?  Since the pressure bomb explosion at an altitude of 2000 meters, then simply select above an altitude of 2000 meters of altitude landing can from danger.For example, Mexico City up to 2300 meters above sea level, where the plane landed is safe.