Santa Cruz is a port city and an important transportation hub in the middle of the Atlantic Ocean and a part of Tenerife Island in Spain. Santa Cruz International Airport is also the busiest airport in the world. 1977 At 04: 47 on March 27th, international standard time, 14: 47, a Boeing 747 of Dutch Airlines was taxiing and taking off on the airport runway, and its huge fuselage roared past under the full push of four jet engines. When preparing to take off, another Pan Am Boeing 747 suddenly rushed out of the taxiway and crossed the main runway in front of it, blocking the way of the Dutch passenger plane. The Dutch passenger plane crashed its huge body of more than 350 tons into the American passenger plane at a speed of more than 300 kilometers per hour. There was a loud noise and the Santa Cruz airport suddenly caught fire. After the Dutch passenger plane crashed into the American passenger plane, it rushed forward for nearly 200 meters due to great inertia, and a continuous explosion occurred, killing all passengers and crew. Because the American passenger plane was not full when it hit, and there was a big gap at the top of the cabin after it hit, some crew members and passengers ***68 people escaped from the gap. According to the investigation afterwards, the plane collision was caused by the chaos of the airport air traffic control system, which killed 576 people and directly lost 425 million dollars. It was the biggest air crash in the 20th century.