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What could be worse than a ruptured pipeline of crude oil? A ruptured pipeline of tar sands oil — a thick, sticky substance. Cleanup of a 2010 spill in Michigan's Kalamazoo River took much longer and was far harder than anyone had anticipated. It's now a cautionary tale for people in the middle of the new Keystone pipeline's path.

The Pew Research Center's latest national poll shows significant declines for nine of 13 news organizations it tests.

Some early investors were allowed to sell, driving the stock price to historic lows.

Mitt Romney told reporters Thursday that he has never paid less than a 13 percent tax rate over the past decade. Until now, the presumptive Republican nominee had sidestepped questions about his personal income taxes. Romney has come under withering criticism over the tax issue from President Obama's campaign and Senate Majority Leader Harry Reid.

Vice President Joe Biden has taken a lot of heat from the Romney campaign for telling a predominantly black audience that Romney would unchain Wall Street and put them back in chains. He made the remarks in Danville, Va., Tuesday. Here's a longer part of that speech that's gotten less airplay.

The Centers for Disease Control and Prevention now recommends all baby boomers get tested for Hepatitis C. The infection, which one in 30 boomers is expected to have, causes serious liver disease, including cancer. It's treatable, but even that is a serious endeavor, involving months of heavy medicines that are taxing on the body. Melissa Block talks with Ana Johnson of San Marcos, Texas, who kept a video journal of her experience with treatment.

Russian authorities are investigating a reclusive Islamic sect said to have lived in subterranean burrows without electricity for 10 years. Officials have taken some 20 children away from the group in a case that pits religious freedom against wider social values.

While smoking in the U.S. has dropped a lot in the past decade, a global survey of smoking finds that nearly 50 percent of men in developing countries use tobacco. Without a reduction in smoking rates, future health costs could be large.

The city turned to aerial spraying, after 10 deaths and studies that found many mosquitos are infected with the disease.

At 40, Julie Sanders is a mother of three from Portland, Ore. But when she was 16, Sanders belonged to a white supremacist group — and one night in 1988, she found herself at the scene of a murder. Since then, she's kept the event a secret from most of her friends and family.