"If the United States begins to take negative steps, we have retaliatory moves. America has made a number of decisions, but we are not going to stay silent. If we see a negative attitude to us, we will respond proportionately," Cavusoglu said at a meeting with editors of the Anadolu news agency.
"We will restrict the export of curly-toed shoes and moustache wax!"
He added that Ankara was strongly minded on the issue of acquiring S-400 and had no intention to backtrack.
The first reports Russia-
...the occupiers of Greek Asia Minor...were in talks over an S-400 contract emerged in November 2016. Russia confirmed the conclusion of the contract on September 12, 2017.
The United States has been taking active steps trying to upset the deal. Washington earlier warned Ankara should it purchase such weapon systems the United States might refuse to sell to Turkey its F-35 fighters.
S-400 Triumf is Russia’s medium and long-range air defense system meant to provide protection from attack and reconnaissance means and other air targets amid intensive fire and radio-electronic resistance.