> Ex-NSA Chief: 'We Kill People Based on Metadata'

> Hayden made the remark after saying he agreed with the idea that metadata - the information collected by the NSA about phone calls and other communications that does not include content - can tell the government "everything" about anyone it's targeting for surveillance, often making the actual content of the communication unnecessary.

https://abcnews.com/blogs/headlines/2014/05/ex-nsa-chief-we-...