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A gunman in an attack at a California church was a Chinese immigrant motivated by hate for Taiwanese people, authorities say.

With gas prices passing $3 a gallon, accusations of price-gouging are common. But what exactly is price-gouging? How is it defined? And are the oil companies guilty of it?

David Bransby, professor of energy crops at Auburn University, is an expert on switch grass, which President Bush mentioned in his State of the Union address. Bransby says switch grass is cheap to grow and provides a high yield crop that can make a lot of ethanol for a low cost.

When a Hummer drives up to NoHo Scooters in North Hollywood, Calif., owner Mike Frankovich is no longer surprised. With big jumps in gasoline prices, sales are skyrocketing at scooter shops around the nation.

A growing number of Americans are embracing ethanol and bio-diesel as possible alternatives to gasoline. But one Berkeley engineering professor is waging a campaign against what he considers a delusion about bio-fuels.

Exxon Mobil's reports fourth-quarter profits of $10.7 billion, up 27 percent over the same quarter in 2004. It's a company record and one of the largest quarterly profits in U.S. history. The company's robust earnings have attracted strong criticism and calls for a windfall profits tax.

ABC news anchor Bob Woodruff's is recovering after he and a cameraman were injured Sunday in a roadside bombing north of Baghdad. Woodruff sought to define his role as an anchor who is also a reporter -- the kind who sometimes puts himself in harm's way.

The political saga around whether to drill for oil in the Arctic National Wildlife Refuge is one of tricky legislative maneuvers, late-night votes and passionate lobbying.

About one out of every 40 cars and trucks in the United States can now run on a commercial mix of gasoline and ethanol, mostly made from corn. And the federal government is backing the renewable fuel industry. But does ethanol really reduce dependence on fossil fuels?

An e-mail chain letter floating around the Internet urges people to boycott Exxon Mobil in an attempt to bring down gas prices. Renee Montagne talks to Tim Haab, associate professor of agricultural, environmental and development economics at The Ohio State University, about the idea. He says it wouldn't work.