Combat crews of the latest S-400 Triumph anti-aircraft missile systemsANKARA, Jan 26 President Turkey Recep Tayyip Erdogan said that the work of Ankara and Moscow on the supply of Russian S-400 air defense systems continues, there are no steps back. Russia and Turkey signed a contract for the supply of four divisions of the S-400 air defense system worth $ 2.5 billion in 2017 , deliveries to the Turkish side were made in the summer and autumn of 2019. The contract included an option for another regimental set. At the end of August 2021, Turkish President Tayyip Erdogan said that he had no doubts about buying a second S-400 regiment from Russia. The S-400 is an understanding that is hidden in ourselves,» the Turkish leader said in an interview with NTV.
