Sure, thanks > No it's just that the NSA used to work to make American companies more secure 1. I'm interested in that history; e.g. how it came about and how

Sure, thanks > No it's just that the NSA used to work to make American companies more secure 1. I'm interested in that history; e.g. how it came about and how it worked. 2. Evidence that this is no longer (or less of) a goal: policy, internal priorities, spending? Congressional testimony, legislation, or guidance? Leaks?