Turkey controls the Dardanelles Strait. But eventually Turkey will get kicked out of NATO.
Sooner than later I hope.
Churchill found out about that in 1915.
Turkey was the enemy in WWI (Gallipoli), and although claiming to be neutral in WWII, kept up strong diplomatic ties with Hitler. They denaturalized Turkish Jews, deported them to Nazi Concentration Camps, and created anti-Jewish laws. Then they tried to claim they actually helped Jews during the Holocaust. How Turkey was ever allowed to join NATO is a question that needs to be answered. Somebody made a few bucks off that deal.