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Can the FBI read your emails without warrants? According to the DOJ, yes. 

That doesn't make any sense, because emails are obviously private communications and deserve the same level of protection that letters in our desk have had for hundreds of years. The Fourth Amendment should protect our digital communications from warrantless searches, but even as our digital devices become smaller and more powerful, our electronic communications privacy law is stuck in the big hair era.

The ACLU's Ben Wizner spoke to Democracy Now! about warrantless snooping and the findings of recent FOIA requests that shed light on the Department of Justice's troubling views. He also discusses the efficacy of surveillance cameras with respect to terrorist threats.