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Use of CT scans in the U.S. has more than tripled in less than two decades. Despite the medical benefits, these scans emit a significant amount of radiation. A new study estimates that 29,000 future cancers could be related to CT scans performed in the U.S. in 2007.

Warren Buffett recently announced plans to buy Burlington Northern Santa Fe Corp. The rail network extends across the the western two-thirds of the U.S. The company's system of 32,000 route miles extends across 28 states and two Candian provinces.

People born and raised in Suffolk County, N.Y., complain about dozens of people living in single-family homes; immigrants complain that they are victimized by locals. An Ecuadorean day laborer was murdered last year, allegedly by teenagers who said they regularly looked for immigrants to bash.

People born and raised in Suffolk County, N.Y., complain about dozens of people living in single-family homes; immigrants complain that they are victimized by locals. An Ecuadorean day laborer was murdered last year, allegedly by teenagers who said they regularly looked for immigrants to bash.

The U.S. dollar has fallen more than 12 percent from its recent peak. Amid worries that it will continue to weaken, some central banks are keeping more of their reserves in euros and yen. There has even been talk of finding an alternative to the greenback as the world's major reserve currency.

Iran said Monday that it test-launched missiles capable of striking Israeli cities and U.S. military bases in the region. The tests came after the disclosure last week of a second Iranian uranium-enrichment plant. Despite its support for new sanctions against Iran, Israel believes military options may ultimately be needed to halt Iran's nuclear program.

Iran said Monday that it test-launched missiles capable of striking Israeli cities and U.S. military bases in the region. The tests came after the disclosure last week of a second Iranian uranium-enrichment plant. Despite its support for new sanctions against Iran, Israel believes military options may ultimately be needed to halt Iran's nuclear program.

The West in recent years has been busy discussing how to handle China's rise. But in an odd symmetry, China has been debating how to respond to America's decline — and how much of a leadership role it wants to take on.

The ranks at Ivy Tech Community College in Kokomo, Ind., are swelling with laid-off factory workers. One in five people in Kokomo is jobless. Many are back in school with the help of a program that pays to retrain workers hurt by foreign trade.

The Federal Reserve held interest rates steady on Wednesday, amid signs of easing inflation. The central bank signaled that its benchmark borrowing rate may start to fall next year.