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Days after it was revealed that Iran has been building a secret nuclear enrichment plant, Iran staged a show of force, testing missiles that could reach Israel or U.S. bases in the Middle East. Will Iran's tactics provoke tighter international sanctions?

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.

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.

On a remote fjord in northwest Greenland, traditional Inuit hunting techniques are being used to stick tiny, high-tech satellite tracking devices onto narwhals — a kind of Arctic whale famous for its long, spiral unicorn horn.

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.

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.

More and more women have had to become their family's primary source of income. But women still don't make as much money as men. When a woman becomes the breadwinner, her family must survive on less than half of their previous income.

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.

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.