Turkey has to make its biggest decision since joining NATO
Turkey has always been at the intersection of two different worlds, bridging the gap where Europe meets Asia, where East meets West, and where many cultures historically clashed. During the Cold War, it was in Muslim Turkey's interest to become a NATO ally. It had remained firmly in the NATO sphere until recently. Now the U.S. is giving the Turkish government an ultimatum.
Within the next two weeks the Turkish government has to decide whether it will maintain its complete alliance with NATO partners and go all-in with the F-35 or risk a severe penalty and buy Russia's S-400 missile system. The Turkish government has already inked a deal to buy Russia's missile defense system, which would remove them from eligibility to buy the 100 F-35 Joint Strike Fighters it was promised – while facing the possibility of U.S. sanctions and other NATO fallout.
The U.S. Department of State gave Turkey until the first week of June to make the call.
Russia's S-400 missile defense system.
Russia called Washington's warning an "ultimatum," and condemned the threat of sanctions as an attempt to strong-arm Ankara into buying Raytheon's Patriot batteries and Lockheed's Joint Strike Fighter. Turkey agreed to pay .5 billion for the S-400 system, one of the most advanced defense systems in the world. Turkey is also one of the manufacturing partners for the world's most advanced fighter. But Turkey is already building the infrastructure for the S-400.
No one has stated exactly what the economic and military consequences for Turkey will be if they fail to reject the S-400.