As Guatemala's new president, Otto Perez Molina, takes office today, the former general carries the burden of a complicated history into a new struggle against violence.

Haiti has long been regarded as a special challenge for international aid organizations. Scott talks with Laurent Dubois, author of the upcoming book Haiti: The Aftershocks of History, about the effect, or lack thereof, of aid money sent to Haiti in the wake of the earthquake two years ago.

The Muslim Brotherhood has emerged as the big winner in Egypt's parliamentary elections. Long oppressed under the regime of Hosni Mubarak, the Islamist party is now the most important power broker in the country. Lourdes Garcia-Navarro reports that the question on everyone's lips now is what does the Brotherhood really represent and how will it govern?

There is a diversity of views in the Republican field for president that is wide, even wild. Host Scott Simon talks with Ross Douthat, a conservative author and New York Times columnist, about the ideological divides in the Republican Party, as apparent in the GOP presidential race.

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SCOTT SIMON, HOST:

And Mitt Romney spent the last week celebrating a major victory and then fending off some major attacks. NPR's Ari Shapiro reports from Aiken, South Carolina.

ARI SHAPIRO, BYLINE: Mitt Romney had a contradictory week. On the one hand, his landslide win in New Hampshire put him solidly on a course to focus on the general election and President Obama.

MITT ROMNEY: This president puts his faith in government. We put our faith in the American people.

The South Carolina primary is one week from Saturday. On Friday night, former House Speaker Newt Gingrich and former Pennsylvania Sen. Rick Santorum hit an upstate barbecue, vying to emerge as the candidate the state's conservative Republicans can rally behind. NPR's Debbie Elliott was there and has this report.

Karaoke machine manufacturers and the distributors of karaoke CDs have had an uphill battle fighting copyright infringement cases brought by music publishers. One player in the karaoke business is fighting a joint venture of Sony and the estate of Michael Jackson over a $1.28-billion bill. Host Scott Simon has more.

The NFL playoffs are well under way. Eight teams are still standing, but two will be sent home on Saturday. Howard Bryant of ESPN.com and ESPN The Magazine joins host Scott Simon to discuss the latest news in sports.

The lack of snow in most of the northeast has extended the hiking season for those willing to brave the cold. Brian Mann takes a winter hike into Roaring Brook Falls in New York's Adirondack Mountains.

Late Friday the U.S. credit rating agency Standard & Poors downgraded nine European countries. S&P suggested Europe's single-minded focus on austerity to solve its sovereign debt problem is just not working. Host Scott Simon speaks with NPR's John Ydstie about the downgrades.