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