Did the US Steal VTOL Technology from Russia to Make the F-35B?

An F-35B Lightning II aircraft assigned to Marine Medium Tiltrotor Squadron (VMM) 262 (Reinforced) lands on the flight deck aboard amphibious assault carrier USS Tripoli (LHA 7), Aug. 4, 2022. Tripoli is operating in the US 7th Fleet area of operations to enhance interoperability with allies and partners and serve as a ready response force to defend pea…