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She's a "consistent, conservative fighter," the ad proclaims. Since winning the Iowa straw poll last August, her poll numbers in the state have fallen into single digits.

Margaret Anderson loved her family, the outdoors and helping park visitors, her father says. The man who authorities suspected was responsible for her death has reportedly been found dead in the park.

Caucuses are meetings, with schedules, that climax with votes that effectively kick off the 2012 presidential campaign.

Brazil's exports to China hit $44.3 billion, an increase of more than 43 percent over 2010. In 2009, China surpassed the U.S. as Brazil's biggest trading partner. For 2011, Brazil logged $256 billion in exports, with a $29.7 billion surplus.

Moammar Gadhafi cracked down hard on Islamists throughout his long rule. With his overthrow and death, Islamist groups are now able to operate freely.

Much has been made of the unusual volatility of the GOP race this year, with candidates taking turns in the front-runner spot in Iowa. But with more outside money and a reliance on social media, the run-up to this election season's Iowa caucuses has been different in other ways as well.

The new year brings an increase in the minimum wage in a number of places around the country, including Washington state, which now boasts the nation's highest statewide rate: $9.04 an hour. But the increase has rekindled an old debate over whether minimum wages make sense — especially at a time of high unemployment.

As Iowa Republicans head to the caucuses to have their say, we look at how the candidates stack up on the eve of the vote — and how previous winners (and losers) eventually fared.

After months of campaigning, it's finally caucus day in Iowa. Polls still show a fluid race, with former Massachusetts Gov. Mitt Romney, Texas Rep. Ron Paul and former Pennsylvania Sen. Rick Santorum heading the pack.

The American College of Physicians urges internists to take cost-effectiveness into consideration when making decisions about patient care, triggering a debate.