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Roads, bridges, airports, water and transit systems are in bad shape, according to civil engineers. The report card from the American Society of Civil Engineers gives U.S. infrastructure a D-plus.

Nearly every year a decades-old school busing program is threatened by the Kentucky legislature in one of the state's largest — and most segregated — cities.

Because what mammal can take down a rodent that sniffs out land mines as well as TB — and jumps 5 feet in the air? Surely not tonight's competitor, the maned wolf.

The Olympics are a great spectacle. So is the sport of figuring out whether the event is a money-maker, a financial flop or something in between.

There's ample evidence cholesterol-lowering pills called statins can reduce the risk of a repeat heart attack. But there's fresh debate about the widespread use of statins to prevent heart attacks in people who've never had one. Are the benefits worth the risks?

Among those on Mitt Romney's list of potential running mates, Rep. Paul Ryan of Wisconsin has youth and experience. He's a conservative from a swing state, and he has big ideas and the policy chops to back them up. But the House Budget Committee chairman's fiscal ideas might cost Romney with independents.

The presidential campaign air war is already being waged to the tune of $20 million a week. Republican Mitt Romney is benefiting from millions of dollars in ads by so-called social welfare organizations, tax-exempt groups that don't have to disclose their donors.

U.S. gymnast Aly Raisman has won the gold medal in the women's floor exercise at the London 2012 Games. Her score of 15.600 beat Romania's Catalina Ponor, who turned in a technically solid performance. Russia's Aliya Mustafina took bronze, and American Jordyn Wieber finished seventh.

Wisconsin Rep. Paul Ryan brings the kind of enthusiasm Mitt Romney could use — he's a darling of the conservative base that Romney has had a harder time winning over. But the ideas that have made him a star — particularly his plans for Medicare — may give Democrats an opening against him.

Testing everyone for HIV and then giving them early treatment could theoretically eliminate the epidemic in South Africa. A mathematical model of this "test and treat" strategy suggest that it might be more expensive and take significantly longer than previously predicted.