Concerns were soon expressed in Washington that "the Russians were from three to five years ahead of the US in the field of atomic aircraft engines and that they would move even further ahead unless the US pressed forward with its own program".
华盛顿很快对“俄国人在核动力航空发动机领域领先美国三到五年并会继续扩大优势，除非美国推进自己的项目奋起直追”这一问题表达了关切。