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  • Colin Powell, a Republican and retired general who was President Bush's first secretary of state, broke with the party Sunday and endorsed Democrat Barack Obama for president. Powell called Obama a "transformational figure" while criticizing the tone of John McCain's campaign.
  • Some legislators say oil speculation is driving up energy prices. But a report released Tuesday concludes that the spike in oil prices may have more to do with supply and demand.
  • In the year since the Minneapolis I-35W bridge collapsed, states appear to be aggressively inspecting bridges to locate problems. But some experts say not enough is being done to fund the maintenance of the nation's aging and crumbling bridges.
  • It doesn't rain that much in Tucson, Ariz., but when it does, Brad Lancaster makes use of every drop. Lancaster has perfected the art of capturing and saving rainwater.
  • It's been a roller-coaster day on Wall Street. New York Stock Exchange floor trader Ted Weisberg, who is president of Seaport Securities, says it has been like a camel's hump — the Dow Jones industrial average was up, then down, then up again before closing nearly 200 points down.
  • Medicare spends about $20 billion each year on implanted medical devices. Nearly half of the total goes for orthopedic surgery. Yet doctors who were surveyed about implant prices could only accurately estimate the prices about one-fifth of the time.
  • When Bolinas, Calif., nearly ran out of water, the town came up with a plan — cut household usage to 150 gallons per day, half the average U.S. home use. The whole town pitched in, including the kids. Late rains saved the water supply, but it was only a reprieve.
  • Mexicans donned masks and stayed home Sunday, as that nation tries to slow the spread of the new swine flu virus.
  • The Environmental Protection Agency appears set to weaken fuel efficiency standards. The move could lead to another legal battle with California.
  • Many Americans don't realize the cheap, plentiful shrimp they buy in the market and order in restaurants is driving U.S. shrimpers out of business.
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