Russia's S-400 threaten US-Turkey cooperation?

Several U.S. military-industrial projects in cooperation Turkey are in question – including the production of the F-35 – if Ankara goes through with the acquisition of a Russian S-400 air defense system, a senior State Department official said.

The potential consequences of the Turkish decision will have a “ripple effect” on other joint production projects, assistant secretary of state for Europe and Eurasian affairs Aaron Wess Mitchell said at the Heritage Foundation in Washington, D.C, USNI news reported.