North Korea stopped four people. They were in charge of a ship that did not work. Kim Jong Un said they were not careful. This was on the news.

North Korea usually doesn't punish its officials much for bad weapon tests. But Kim arrested four officials. This means his army plan and rules are very important to him.

On Wednesday, a big ship broke when Kim was there. Something fell off the back of the ship in Chongjin. Now, the ship is on its side with blue covers, and some parts are in the water.

Kim was very angry. The warship was important for his navy. He said some people were not careful and did a bad job.

The news said Ri Hyong Son was caught. He works for the Workers Party. He said he was very sorry because the rocket did not work.

On Sunday, KCNA said three men from the Chongjin Shipyard are in jail. They are the main engineer, the boss of the ship factory, and a manager.

Hong Kil Ho works at the shipyard. He had to answer questions, said KCNA.

On Thursday, North Korea said bad people must pay. But we don't know their punishment.

When Kim started to rule, he killed important people. People think he did this to be strong and keep his power. Now, he does not kill many people because he has all the power, like his father and grandfather.

Kim helps scientists who make weapons. He wants more nuclear weapons and missiles. He gave them new homes in Pyongyang. Last year, a satellite launch did not work. Kim told his scientists it was okay. He said, "Mistakes help us win." The news said this.

Kim wants to make many new weapons. He made a plan for this in 2021. Kim says North Korea needs more ships and missiles. He says this is to be safe from the U.S.

Last month, North Korea showed a new big ship. It is their biggest and best warship. They say it can carry many weapons. The leader said it was a big step for their navy.

North Korea said the ship was not badly broken. They said only some water got in, and the side of the boat had some marks.

North Korea said on Friday it needs about 10 days to fix things. But many people think the damage is worse.