The raiders ran out of fuel because they had to launch early because the taskforce was spotted by a Japanese patrol boat. The Soviets didn't get US bomber tech

The raiders ran out of fuel because they had to launch early because the taskforce was spotted by a Japanese patrol boat. The Soviets didn't get US bomber technology from the Doolittle raid, they got it from emergency landings of B-29s in Soviet territory during the strategic bombing of Japan in 1944: https://en.wikipedia.org/wiki/Tupolev_Tu-4 https://en.wikipedia.org/wiki/Tupolev_Tu-4