Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Turkey: Russia Completes First Part of Delivery of Missile Defense System Dorian Jones ISTANBUL - The Turkish government says Russia has completed delivery of the first shipment of Moscow's S-400 missile defense system, which has been a point of contention with the United States. The announcement comes as Turkish President Recep Tayyip Erdogan confirms his commitment to use the system next year, while reaffirming his commitment to deepening ties with Russia. "In the coming spring, God willing in April 2020, we will be able to start using this system," Erdogan said in a televised speech to party officials at the presidential palace. The S-400 purchase has already resulted in Turkey's exclusion from buying America's latest F-35 aircraft, NATO's newest stealth fighter jet. The White House has said theF-35 "cannot coexist with a Russian intelligence collection platform that will be used to learn about its advanced capabilities." .