As early as 2014, the Pentagon admitted it "has no great solution" to reduce its dependence on Russian-made rocket engines.

The US received a new batch of Russian RD-180 and RD-181 rocket engines in 2018, despite the US Treasury slapping tough new sanctions on the country.

At least 40% of Russian titanium aircraft parts have been sold to Boeing in the last several years. Russia has since threatened to halt titanium exports to the US. 

We noted if Russia banned rocket engines and titanium aircraft parts to the US, it would paralyze Boeing. It's still amazing after all these years of hard talk between Washington and Moscow -- the Pentagon continues to allow Boeing to expose critical parts of its supply chain to Russia.

Sputnik News reports that Boeing's new CST-100 Starliner, the program that has been in development since 2011 to replace the Space Shuttle, uses Russian-made parts.