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In the face of abuse concerns, Medicare covered more prescriptions for potent controlled substances in 2012 than in 2011. Top prescribers often have faced disciplinary action or criminal charges.

Last week, thousands of Haitians gathered in a stadium for the final round in a national songwriting contest. The topic: restavek, the term for the thousands of children who are modern-day slaves.

Soccer, Spain's national pastime, has been tainted by racism. After two recent ugly incidents, debate is raging over how to punish racist fans, and if the teams they love should be held responsible.

This year's 11 top-grossing films starring black actors and by black directors almost doubles the number of last year's slate of comparable films. Industry watchers say Hollywood needs a stronger infrastructure of support for black filmmakers to sustain this level of racial diversity on and off the screen.

Sixty-two percent approve of the job the president is doing handling the pandemic, but he gets a lower 49% overall job approval rating, signaling potentially tough legislative fights ahead.

Four years of too little water is killing millions of trees in the Sierra, yet some giant sequoias still thrive. Tree-climbing scientists are exploring sequoias branch by branch to find their secret.

Just a few days before the first round in France's presidential election, a gunman in Paris killed a police officer. Candidates are now talking about security issues.

Colombia's presidential election is Sunday, and for the first time, a leftist candidate is favored to come out ahead. Business elites are nervous.

After 16 days and 109 events, the Winter Olympics officially ended Sunday with the traditional closing ceremony. Team U.S.A. finished with 25 medals in all.

Some ecosystems have already been irreversibly altered, scientists say. And climate change is wreaking havoc on human health.