https://en.wikipedia.org/wiki/MUSCULAR_%28surveillance_progr...
That was the famous slide that showed where Google took off SSL with a little smiley face--which reportedly caused Google engineers to "explode with profanity."
The NSA actually did not do the actual hacking. The British GCHQ did, with technical assistance from the NSA. Thus the NSA could pretend that since the GCHQ collected all the information, it was foreign-sourced and therefore not subject to FISA court jurisdiction.
