ISTANBUL -- Turkish President Recep Tayyip Erdogan says he discussed cooperation with Russian counterpart Vladimir Putin on military and civilian projects -- including new nuclear plants, submarines and the space program -- and vows to press ahead with a missile defense system deal that has resulted in U.S. sanctions.
There will be "no step back" from the purchase of Russian-made S-400 missiles, Erdogan told Turkish reporters Wednesday on a flight back from the Russian city of Sochi, where he met with Putin.
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