German video resolving the first of three challenges: https://www.youtube.com/watch?v=mZH094d0M6A
almost obligatory snark:
is this the same NSA which allowed/enabled one Edward Snowden to walk out with a gigantic treasure trove of super ultra mega top secret documents, vital to national security, on a USB thumb drive (or whatever it was)?
because this point is among the many data points I now have in my mind, as a US citizen and adult voter, when I get to decide exactly how much power I'd like those "smart" folks to have, as they build/run a global 24x7 passive data snoop system on, effectively, all of humanity.
equations may be elegant, perfect, ideal
executable software: less so
human procedures & rules & everyday happenstance & one-off oopsies: far less