WASHINGTON: A top Pentagon official said on Thursday the consequences would be “devastating” for Turkey’s joint F-35 fighter program and its cooperation with NATO if the country bought a Russian missile defense system.

Kathryn Wheelbarger, Acting Assistant Secretary of Defense for International Security Affairs, said that Ankara’s planned purchase of the S-400 system would damage Turkey’s ability to work together with the Western alliance, and force Washington to hit the country with sanctions.

“Completion of this transaction would be devastating, not only to the F-35 program, on which the West has placed its modernized integrated air capability, but it would potentially rupture Turkish interoperability with NATO, a key aspect of the defense of the alliance,” Wheelbarger told an audience at the Atlantic Council in Washington.

“Let’s be clear. The S-400 is a Russian system designed to shoot down an aircraft like the F-35, and it is inconceivable to imagine Russia not taking advantage of that collection opportunity.”

Wheelbarger said the US believes Turkey is pursuing the deal to get Russia’s support against Kurdish rebels along its border with Syria.

But she warned Ankara that Russia is not a reliable partner over the long term, doesn’t back its military sales with maintenance and other support, and is simply trying to undermine NATO cohesion.

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