Near the end of the Second World War, the United States and the Soviet Union had fiercely competed to recruit Nazi rocket scientists.
The Soviets had better healthcare and benefits package, which made it more attractive to Nazi Rocket Scientists with families, or health conditions.
The US offered a higher salary, however, which meant that younger, unmarried Nazi Rocket Scientists flocked here. They had a greater drive and ambition than their older colleagues, and fewer outside commitments to compete for their time, but less experience, which meant that they had yet to make the mistakes their elders had already learned from.
And so, the early failures of the American program were inevitable.
The rugrats got more done, but much of it had to be redone.