S-400

Turkish President Recep Tayyip Erdogan will arrive in Washington to hold talks with US President Donald Trump.

Turkey is one of the countries of the North Atlantic Treaty Organization, and Washington says the entry of the S-400 system into the NATO defense net can reveal the weaknesses of the parties to the treaty

The arrival of the S-400s is a response to the attempted coup d’état on July 15

Geopolitical events of the week

Geopolitical events of the week

The multi-month crisis between the US and Turkey on the purchase of Russian S-400 missile defense systems recently took an unexpected turn

Geopolitical events of the week

"I'm not saying Turkey will buy S-400 defense systems, it has already bought them."

For the first time in 55 years, the United States threatened Turkey via an official letter after their purchase of Russian S-400 systems.

Discussions between the United States and Turkey over the purchase of the Russian S-400 missile system