"The National Security Agency has a secret backdoor into its vast databases under a legal authority enabling it to search for US citizens' email and phone calls without a warrant, according to a top-secret document
“The National Security Agency has a secret backdoor into its vast databases under a legal authority enabling it to search for US citizens’ email and phone calls without a warrant, according to a top-secret document passed to the Guardian by Edward Snowden.”
See the full story: NSA loophole allows warrantless search for US citizens’ emails and phone calls – Exclusive: Spy agency has secret backdoor permission to search databases for individual Americans’ communications (Guardian, link)