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Meet the most powerful man in government you've never heard of
Chris Hayes looks at General Keith Alexander's historically long reign over the NSA with James Bamford and explains why he may be the most powerful man in Washington that you have yet to hear of.
The inexplicable weirdness of Rick Scott04:31
Bad news for some blue state GOP governors05:30
Leaks from the Mike Brown investigation surface07:27
Amazing video of Ottawa post office evacuation01:35
Who was the Ottawa gunman?07:38
Shooting attack in Ottawa stuns Canada16:11