According to the news agency, the US abrogated the 2007 F-35 deal with Turkey and concluded a new one with the remaining participants in the program — Australia, Canada, Denmark, Italy, the Netherlands, Norway and the UK, Sputnik reported.
The decision by Turkey, a NATO member, to deploy the Russian-made air defense system instead of the US Patriot system triggered a crisis in relations between Ankara and Washington.
In July 2019, the first batch was delivered to Turkey. Despite the US authorities' repeated demands to abandon the deal and sanctions introduced last December, Ankara refused to make concessions and has continued negotiating the additional supply of Russia's S-400s.