Turkey sees improvement in F-35 talks with U.S. but prepares for sanctions
Turkey and the United States are at odds over Ankara's decision to buy Russian S-400 defense systems which cannot be integrated into NATO systems.
RUSSIAN PRESIDENT Vladimir Putin and his Turkish counterpart Tayyip Erdogan arrive for a joint news conference following their meeting in Istanbul, Turkey, last year.(photo credit: REUTERS)ByREUTERS