Well, it's not a documentary (I was joking), it's a movie. Basically, an organisation, supposed to be the good guys (called S.H.I.E.L.D.), built aircrafts filled with super weapons. On top of that, those aircrafts have access to every social network of every citizens of the USA (facebook, twitter, instagram, ...). The goal is to analyse every profiles and start eliminating the bad people, even before they commit a crime. The twist is that the organisation has been infiltrated by the bad guys (called HYDRA) and they want to take out all the good citizens so they won't get in the way of their global take over.