Turkey has begun tests of the radars associated with its new Russian S-400 using American made F-16 Viper and F-4 Phantom 2 aircrafts, defying warnings from the United.
US officials had been concerned that the Turkish military might conduct exactly these sorts of tests with the F-35, potentially giving Russia insights into the jets' capabilities. The Pentagon already ejected Turkey from the F-35 program earlier this year and is finalizing efforts to remove Turkish defense contractors from the supply chain, as well.
The testing, which began on Monday, is scheduled to continue through November 26.
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