North Korean President Kim Jong Un has been conducting missile tests and nuclear weapons tests, despite warnings from the world's nations.

This was condemned by the US, South Korea, Japan. Furthermore, the UN has also imposed economic sanctions on North Korea.

But we will not be afraid of anything. The weapons we test are to protect our country. US will not controll us. If they tries, we will use atomic bomb, North Korea warned to US.

Thus, the word conflict between the two countries is growing. Meanwhile, US President Trump was an old man who criticized North Korean President Kim Jong Un.

For that, Trump replies on his Twitter page.

In this, Why would Kim Jong-un insult me by calling me "old," when I would NEVER call him "short and fat?" 

Oh well, I try so hard to be his friend - and maybe someday that will happen, he said.

Many people have replied that this tweet has become a surrender to the North Korean president because of his old.