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The voting in the Iowa GOP caucuses begins Tuesday night. On the last day before the caucuses, Republican presidential candidates campaigned across the state Monday. Their goal was the same — motivating supporters to leave their homes on a cold evening, go to their precinct meeting places and vote.

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Authorities in Los Angeles are celebrating the arrest of a suspect in dozens of fires. L.A. County Supervisor Zev Yaroslavsky told reporters that residents can finally get some rest.

ZEV YAROSLAVSKY: Our long, four-day nightmare is over. This has been, literally, a nightmare. I haven't had a good night's sleep since last week, and I'm looking forward to one tonight.

One year ago, protesters across the Arab World began to rise up against autocratic rulers, forcing several from power. These revolutions have led to the region's biggest upheaval in decades. It's still not clear how these seismic changes will play out, and so far, the results have been mixed. In a six-part series, NPR is taking a look at where the region stands today. In the second installment, NPR's Lourdes Garcia-Navarro reports on how Islamists in Libya, long suppressed during Moammar Gadhafi's 42-year rule, are now able to operate freely.