More broadly, Alexander on Wednesday defended the overall NSA effort to monitor communications. And he said that as Congress considers proposals to scale back the data collection or provide more transparency to some of the programs, it's his job to lay out the resulting terrorism risks.
"I'm concerned that we give information out that impacts our ability to stop terrorist attacks. That's what most of these programs are aimed to do," Alexander said. "I believe if you look at this and you go back through everything, none of this shows that NSA is doing something illegal or that it's not been asked to do."
Pointing to thousands of terror attacks around the world, he said the U.S. has been spared much of that violence because of such programs.
"It's because you have great people in the military and the intelligence community doing everything they can with law enforcement to protect this country," he said. "But they need tools to do it. If we take away the tools, we increase the risk."
美国《华盛顿邮报》10月30日援引爱德华•斯诺登文件称,美国国家安全局(NSA)曾入侵雅虎和谷歌遍布全球的数据中心的主要连接通道。
***曝光
日期为2013年1月9日的机密报告显示,NSA每天从雅虎和谷歌的内部网络截取数百万条信息,并将这些信息发送回马里兰州米德堡的NSA总部的数据库中。在此之前的30天里,数据收集人员曾处理并发回1.8亿多条新记录,这些数据包括电子邮件的发件人、收件人、时间等“元数据”,还有文本、视频、音频等内容信息。
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