The U.S. Department of Justice certainly wasn't eager to publicly share a 2011 opinion by the Foreign Intelligence Surveillance Court that found the government violated the Fourth Amendment in sweeping up tens of thousands of Americans' emails. The government fought a Freedom of Information Act lawsuit to keep it secret.

Last week, the Obama administration released the 85-page opinion — written by U.S. District Judge John Bates — amid efforts to convince the public that self-policing and court oversight protect personal privacy.