“Undocumented bases are immune to oversight by the public and often even Congress,”
http://www.tomdispatch.com/post/176513/tomgram:_nick_turse,_one_down,_who_knows_how_many_to_go/
http://www.tomdispatch.com/post/176513/tomgram:_nick_turse,_one_down,_who_knows_how_many_to_go/