Destroy an asteroid

Thousands of meteors entering the Earth's atmosphere continue to be studied. Although most of it burns out in the atmosphere before it reaches the surface of the Earth, not a few also escaped and hit the earth.
The effect caused by the meteor fall looks so awesome. The explosion caused by the collision of celestial bodies with the earth was able to destroy the surrounding area. The fall of this meteor can also cause a large dome. For example, some meteors that can be recorded as notes on this earth are:
1. Vredefort is estimated to hit Earth 2 billion years ago in South Africa. This meteorite caused the formation of a crater covering an area of 190 kilometers.
2. Sudbury fell 1.8 billion last year causing the formation of a large basin in Ontario, Canada with an area of 130 km.
3. Acraman of falling and hitting the Earth 580 million years ago in South Australia led to the creation of Lake Acraman in South Australia, which is around 90 square kilometers
The fall of meteors or asteroids is also thought to be the cause of the extinction of dinosaurs and could destroy humanity.
Therefore, the researchers immediately took samples of the pieces of meteorite left in a lake. They examined the hardness of this stone. Likewise the content of nickel ore and metals is very hard to exceed diamonds. This type of stone from the sky is then tested to cut diamonds and succeed.
From further investigation they will confront an asteroid which has approached the earth. With the approval of the government and the support of various parties they were given the mandate to destroy an asteroid three times the size of the earth.
This plan is very carefully prepared. All steps are carried out with very high precision. All is done to maintain the survival of humanity and ecosystems on earth. Because, if the asteroid succeeds in getting into the atmosphere and some of it falls to earth it will certainly destroy a continent. After the research was completed and found the best way to destroy the asteroid before entering the atmosphere, an asteroid destroyer team was immediately sent. They were given the task of drilling asteroids and blowing up outside the Earth's atmosphere.
After getting out of the earth's orbit and approaching the asteroid they immediately launched a drilling machine made of metal from asteroids that had been modified into a machine. With this drilling machine, the middle part of the asteroid can be perforated up to 1200 kilometers from the surface. Drilling is done in 4 different places. After completing drilling they install TNT explosives that can destroy the asteroid. After the installation of explosives was completed by setting the time for the blasting, they immediately left the asteroid. On their way to earth they saw a large explosion that caused a shock wave on the plane they were riding. Luckily when the shock wave came they were far from aerobic and ready to enter the Earth's atmosphere. Eventually the asteroid was destroyed and did not fall to earth.
Thank you @xpilar i hope you accept my thought.
Warm regard from Indonesia