section_path: Foreign interest/United States
section_name: United States
paragraph_text: United States
  
  In June 2020 United States senator John Thune proposed an amendment to the (ultimately unsuccessful) Senate version of the 2021 National Defense Authorization Act to allow the US Department of Defense to purchase Turkey's S-400 system with funds from the U.S. Army 's missile procurement account, thus negating Turkey's contravention of the CAATSA sanctions. This was an attempt to allow Turkey to re-enter the F-35 Lightning II acquisition and ownership program.
  
  In June 2020 United States senator John Thune proposed an amendment to the (ultimately unsuccessful) Senate version of the 2021 National Defense Authorization Act to allow the US Department of Defense to purchase Turkey's S-400 system with funds from the U.S. Army 's missile procurement account, thus negating Turkey's contravention of the CAATSA sanctions. This was an attempt to allow Turkey to re-enter the F-35 Lightning II acquisition and ownership program.