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| S-400 missile-defense system Photographer: Alexander Nemenov/AFP via Getty Images |
Turkey is assessing whether to delay taking delivery of the S-400 Russian missile defense system, currently scheduled for July, after a new request from the United States, a source familiar with the matter said on Monday.
The move would be a rare pause in months of escalating tensions between the two NATO allies, which have been at loggerheads over Turkeyโs planned purchase of the Russian system, which the United States opposes.
Washington requested last week that Ankara consider postponing taking delivery of the system, a source familiar with the matter said on the condition of anonymity.
There was no immediate response from Turkey, which has said repeatedly it was not going to back down from its planned purchase. Last week, Fahrettin Altun, spokesman for Turkish President Tayyip Erdogan, said the procurement of S-400s was a โdone deal.โ
The source said talks on the issue continued.
U.S. officials have called Turkeyโs planned purchase of the S-400 missile defense system โdeeply problematic,โ saying it would risk Ankaraโs partnership in the joint strike fighter F-35 program because it would compromise the jets, made by Lockheed Martin Corp.
The United States and other NATO allies that own F-35s fear the radar on the Russian S-400 missile system will learn how to spot and track the jet, making it less able to evade Russian weapons.
Ankara has also been pushing Washington to establish a working group to assess the risks the system would be posing to the F-35 jet. The United States has so far been reluctant to accept.
The disagreement is the latest in a series of diplomatic disputes between the United States and Turkey. They include Turkish demands that Washington extradite cleric Fethullah Gulen, differences over Middle East policy and the war in Syria, and sanctions on Iran.
