That being said, I do think we whould always be wary of police and generally question the government. It's important we keep into perspective what's actually a threat and whats just unfortunate. Both should be improved, but one (the NSA) can prevent any sort of improvement, the police shooting rate seems to be more of an over reaction and mistake that almost everyone agrees should be fixed.
https://www.washingtonpost.com/news/wonk/wp/2016/07/13/why-a...
http://www.sciencechannel.com/tv-shows/through-the-wormhole/...