Mary Louise Kelly

American intelligence officers are trained to tackle tough targets.

But there are tough targets, and then there's Russian President Vladimir Putin, who plays his cards so closely that it's hard for his own advisers to divine what he's thinking, says Gregory Treverton, chairman of the National Intelligence Council.

Here's one way to think about Osama bin Laden: as the one-time leader of a now fading terror network. Most terror experts believe that al-Qaida today has been eclipsed by the even more savage Islamic State, or ISIS.

But here's another way to think about bin Laden: as a man who understood that one of the greatest threats to his group came from other jihadists.

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John Brennan is walking with a limp these days — a testament to the hazards of shoveling your own driveway. Even the director of the CIA had to dig out just like the rest of us, after last month's blizzard shut down Washington, D.C.

But this past weekend, once he settled into a leather armchair at the head of the table where he holds daily staff meetings, Brennan held forth on subjects ranging from Syria to cybersecurity to the state of ISIS. NPR interviewed Brennan on Saturday at CIA headquarters in Langley, Va.

Here are some of the highlights:

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