Crime scene: 162 mystery solving puzzles to find out who the murderer is

Chapter 20 The Terrifying Demolition Plan
Less than 20 minutes after the flight to New York took off, an anonymous phone call was received: "We installed a bomb in the flight to New York. Ten minutes after the flight took off, the timing device in the bomb box went off. Start the operation, when the plane is about to land and drops below 10 meters above sea level, due to the influence of air pressure changes, the bomb will send the whole crew to the sky, haha..."

After the captain heard the bad news from the airport, his face turned pale in an instant.The atmosphere in the aircraft control center became tense.Because the plane is currently flying at an altitude of 1 meters above the ground, if it lands at a low altitude of 2000 meters above sea level, the plane will explode.Then the flying altitude of the plane must not be lower than 2000 meters, but after the fuel is exhausted, the bomb can't be found, so how to escape from death?The experienced captain suddenly thought of a wonderful method: "Don't worry, everyone, I have a solution!" So he changed the course and continued to fly.When approaching a certain airport, the plane landed one by one from the altitude of 8000, 6000, 5000, 4000, 3000 meters, and finally landed safely.

After checking the plane, experts found special bombs on the tail fin, which did not have an airtight device.In order to prove the reliability of the bomb, an experiment was carried out, and it exploded at an altitude of 2000 meters.Since the power of the bomb has not diminished, why did the plane land safely?
[Answer] It is definitely safe to land at an airport above 2000 meters above sea level.Mexico City is located on a plateau at an altitude of 2200 and 2300 meters. The captain changed course and landed at the airport in Mexico City.

(End of this chapter)