Saudi Arabia and the UAE are friends. They worked for many years. Now, they have problems. The problems are about Yemen.
Saudi Arabia thinks the UAE did bad things. These things hurt Saudi security. The two countries do not agree. They do not agree about Yemen's future.
They have different ideas. The UAE helped the STC. The STC wants South Yemen to be free. Saudi Arabia thinks this is not safe.
Saudi forces stopped cars. The cars were from the UAE. Saudi Arabia wants the UAE to leave. The UAE is now leaving.
This fight between friends is bad. Yemen's people have suffered. More fighting could happen.
This problem could affect other places. The friends are now competing. Saudi Arabia will protect its country.