Pompeo tells Turkey its purchase of S-400 missile defense system will endanger U.S. military

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.