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Nine national medical groups have identified 45 diagnostic tests, procedures and treatments that they say often are unnecessary and expensive. The head of one of the specialty groups says unneeded tests probably account for $250 billion in health care spending.

One widely watched report estimates that employers added 209,000 jobs to payrolls last month. But Yahoo announced 2,000 layoffs — about 14 percent of its workforce.

U.S. medical practices bought counterfeit medicine labeled as Altuzan from a foreign supplier, the FDA says. Altuzan, which is the Turkish brand name for the blockbuster drug Avastin, is approved for use in Turkey but not in this country.

The blast killed at least six and was a stark reminder of the country's fragile security situation.

Seniors are traditionally the biggest consumers of prescription drugs, but they aren't using as many. Greater use of generics also played a role in last year's slow growth.

Mohawks from a small reserve outside Montreal have been building this country's skyscrapers and bridges since the 1900s. But with fewer Mohawks going into the trade, the tradition may be on the wane.

The coroners final report says that Houston was found lying face down in the bathtub of her hotel room.

Twenty years ago this week, the Bosnian war began with the siege of Sarajevo, the longest in the history of modern warfare. The siege ended more than three years later, leaving 100,000 dead — the worst atrocities in Europe since World War II. Despite international intervention, ethnic fault lines in Bosnia remain deeply entrenched.

Mitt Romney is closer to winning the GOP presidential nomination after primary victories this week in Wisconsin, Maryland and Washington, D.C. Halfway through the GOP nominating season, Romney's attacks on President Obama are intensifying.

A Spanish bond auction went poorly Wednesday, suggesting that Spain may be becoming the next Greece. It was the first auction without a lot of help from the European central bank.