WASHINGTON/ANKARA—The U.S. Secretary of State Mike Pompeo said on Monday the United States has made clear to Turkey that its purchase of Russian S-400 missile defense systems would endanger the security of U.S. military technology and personnel.
Pompeo said he has urged Turkey to resolve the S-400 issue in co-ordination with the United States. But with Ankara rejecting all proposals, the United States announced sanctions on the country, which is a member of NATO—a military alliance formed to protect western Europe from the threat of Soviet Russia’s communist expansionist ambitions.