The Guardian, the primary source of the documents leaked by NSA whistleblower Edward Snowden, has put together an excellent page devoted to the story. They talk about the size and scope of the domestic and foreign spying. They have excellent infographics to help visualize the complicated topics at hand. The format of the page, with interview clips throughout the discussions presented in each section, are exemplary. I highly recommend giving the page a look for anyone that would like to know more about the discussion about domestic and foreign spying.
I'd comment further, but the page speaks for itself.