Pentagon says that it is "deeply concerned" with reports that Turkey is bringing it into operation the S-400 missile defence system that it had purchased from Russia.
Giving the UAE F-35 fighter jets could render all the research and effort behind the next-generation stealth aircraft useless.
Axios reports Abu Dhabi last week cancelled a tripartite meeting in protest against Israeli Prime Minister Benjamin Netanyahu's opposition to the US selling F-35s to the UAE.
Turkey had procured the S-400 missile defence systems from Russia after talks with the US on its American Patriot defence systems had broken down.
Lieutenant Colonel Mike Andrews, a US Defense Department spokesman, said a decision had been made in late 2019 "to honour existing contractual arrangements and accept delivery of parts that were already on contract."
President Trump, who made the remarks during an interview with Fox Business Network’s Maria Bartiromo, said the US makes parts for F-35 jet all over the world and cited challenges of global cooperation.
Budgetary failures, political deadlock, technology goof-ups, and internal schisms are all standing in the way of Israel’s latest military plan.
US President refuses to endorse bill, which angered Turkey, and exposed rifts between the White House and US lawmakers.
Turkey and Russia pledge to continue cooperation in the military and energy spheres as well as in Syria.
Turkey hits back at the latest sanctions threats from the US, we take a look at how US-Turkish relations have changed over the decades.
Foreign Minister Mevlut Cavusoglu said more missile systems are essential for Turkey's security and despite the purchase of Russian S-400s, Ankara is open to buying US-made Patriots.
Turkish Defence Minister Hulusi Akar said Turkey would have to look for alternatives if it could not acquire US F-35 jets over the purchase of the advanced Russian S-400 air-defence system.
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