So there was a big airplane called Korean Air Cargo Flight 8509. It was supposed to go from South Korea to England. But something went wrong and the airplane crashed into the ground. It was a really big crash and all the people on the airplane died.
People who study airplanes looked at what happened and they found out that the pilots of the airplane made a big mistake. They didn't pay attention to the instructions they were supposed to follow. This mistake made the airplane go in a direction it wasn't supposed to go in and it caused the crash.
This was a very sad thing because a lot of people lost their lives. So now, whenever people fly airplanes, they make sure to always pay attention to their instructions and make sure they are doing things the right way so that everyone stays safe.