Cryptome -- cryptome.org -- has been quietly compiling damning evidence of shady U.S. government activity since 1996, long before Ed Snowden, Wikileaks, and the National Security Agency became household terms.
Cryptome's founders, John Young and Deborh Natsios, operate as a kind of conscience/ombudsmen/arbiter for cyberleakers and cyberleaker outlets.
Donate to cryptome.org -- http://cryptome.org/donations.htm -- and receive the Cryptome archive of over 70,000 documents on a USB. (Caveat: doing so may possibly attract the attention of that bastion of benign benevolence, the NSA -- if you haven't managed to accomplish that feat already.)