Petlyakov Pe-8: Russia's Only Four-engine Bomber From World War II | The National Interest
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Russia's Forgotten WW2 Heavy Bomber, and Why It Failed | Petlyakov Pe-8 - YouTube
Soviet heavy bomber Petlyakov Pe-8 during a visit to the US in 1942. This unit was operating as a VIP transport for People's Commissar of Foreign Affairs (Foreign Minister) Vyacheslav Molotov. :
Why Russia's WW2 Heavy Bomber Failed | Petlyakov Pe-8 – War Bird Fanatics