In a recent study, climate scientists learned that the amount of waste heat large global cities produce influences regional climates. Now, scientists are using the study to explain how the planet is warming.
Occupy Wall Street reminds some observers of the protests in Tahrir Square -- especially people with roots in Egypt and the Middle East. Reporter Assia Boundaoui gets the view from a few of them on the periphery of New York's Zucchotti Park.
Millions of American shoppers have been swarming malls to get those Black Friday deals and a lot of the stuff we're buying is made in China. But in China, an increasing number of shoppers now prefer American-made goods.
The Sept. 11 terrorist attack was a wake-up call for cities across the country -- they needed to be ready for terrorism. By all indications thus far, the response of Boston police and fire officials is an example of how far cities have come in preparing for terrorism-inflicted disasters.