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2008年，美国彻底叫停了这个项目。当然，叫停的原因并不仅仅是因为俄罗斯反对，而是美国人发现这并不是个好主意，近在咫尺的察打一体长航时无人机，远比从本土发射导弹反应快得多，还不会有触发核战争的政治风险。关键是，成本还低得多。，推荐阅读超级权重获取更多信息
In recent months, federal health leadership has unilaterally changed long-standing childhood vaccine recommendations against the advice of the country’s top medical organizations. The lack of transparency and supporting evidence for these changes has sown uncertainty for physicians, insurance providers, and families. And the consequences are already visible.