Robert Siegel

Former Mexican President Felipe Calderon leads a group to encourage heads of state to propel climate change. He discusses the obstacles that block aggressive efforts to curb climate change.

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ROBERT SIEGEL, HOST:

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ROBERT SIEGEL, HOST:

It's still more than 15 months until the Iowa caucuses, and no one in the crowded field of Republicans with presidential ambitions has announced. But things are already happening in Iowa, especially for Sen. Rand Paul of Kentucky.

Paul has reached out to Iowans who never considered voting for his father, Ron Paul, who made a respectable third-place showing there in 2012.

He's still popular with his father's old supporters. Many of them are in the so-called liberty faction of the Iowa GOP.

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ROBERT SIEGEL, HOST:

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ROBERT SIEGEL, HOST:

Copyright 2014 NPR. To see more, visit http://www.npr.org/.

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ROBERT SIEGEL, HOST:

When we're searching for the right word to say, or we don't know what to say or how to say something, this happens.

(SOUNDBITE OF ARCHIVED RECORDING)

UNIDENTIFIED PEOPLE: Um - uh...

The U.S. has begun airlifting humanitarian aid and conducting limited airstrikes in the attempt to protect Iraq's refugee populations of religious minorities. NPR's Tom Bowman talks with Robert Siegel about the possible policy options for the U.S. in Iraq.

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