"They had access on everyone who has applied for a security clearance: families, residences and job assignments, bank records." ... If that's not an absolute calamity, I don't know what is."-"Victor Socotra," pen name for a retired US intelligence official and blog-ger, commenting on China's cyber theft of data on US service members, Military Times, June 17. "X-51 [hypersonic vehicle] was really a proof-of-concept test. It showed that you could get a scram jet engine, launch it off an aircraft, and it could go hypersonic. It was able to go more than Mach 5 until it ran out of fuel. It was a very successful test of an airborne hypersonic weapons system. What they are trying to do now is build the whole system so that it is not just about the engine. You have to have materials that can operate at the kind of temperatures you have when you are going at hypersonic speeds. You have to have guidance systems that will function when you are going at those types of speeds. There are a bunch of technological challenges that have to be addressed to make a functioning system that will work.... The advantage of hypersonics is not just that something goes very fast-but that it can go great distances at those speeds."-Air Force Chief Scientist Mica R. Endsley, commenting on the Air Force hypersonic effort, quoted in Military.com, June 1.
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机译：“他们可以访问所有申请安全检查的人：家庭，住所和工作任务，银行记录。” ...如果那不是绝对的灾难，我不知道这是什么。”-“维克托·索科特拉”（Victor Socotra），一位退休的美国情报官员和博客作者的笔名，评论了中国在美国服务人员网络上的数据失窃事件，军事时报，6月17日。“ X-51（超个人交通工具）确实是一种概念验证测试。它表明您可以购买超燃冲压发动机，将其从飞机上发射出去，并且可以超音速飞行。它能够超过5马赫，直到耗尽燃料为止。这是对机载高超音速武器系统的一次非常成功的测试。他们现在想要做的是构建整个系统，以使它不仅与引擎有关。当您以超音速运行时，您必须拥有可以在那种温度下运行的材料。您必须具有在以这些类型的速度行驶时将起作用的引导系统。要使一个功能正常的系统正常工作，就必须解决一系列技术难题。...超音速技术的优点不仅在于运行速度非常快，而且还可以在这些速度下相距甚远。”空军首席科学家米卡·恩德斯利（Mica R. Endsley）在6月1日在Military.com上对空军的超音速努力发表了评论。
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