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Two companies say the best way to slow global warming is to dump iron into the oceans. The iron would trigger blooms of tiny plants that suck carbon dioxide out of the atmosphere and then keep it trapped deep in the ocean. But scientists are wary.

President Bush recently honored the Dalai Lama with the Congressional Gold Medal. The medal is the highest civilian honor bestowed by Congress. In response, China is protesting the award. Asian journalist Thomas Laird is joined by Kenneth Lieberthal, an expert on China, to offer analysis.

As fires continue to ravage Southern California, few are more destructive than the San Diego County Harris fire. Capt. Martin Johnson, a California Fire spokesman fighting the Harris fire, talks with Michele Norris about what life is like for a firefighter on the front lines.

In recent years, many big cities have suffered epidemics of fatal heat stroke, and scientists predict more-frequent heat waves. But global warming isn't the only factor. Big cities also create their own heat.

The mine cave-in last week in Utah was the second collapse at the Crandall Canyon. One last spring was in a section near where the six miners are now trapped. According to a consultant's memo, the earlier cave-in caused the company to abandon that section of the mine.

Karl Rove, President Bush's close friend and chief political strategist, plans to leave the White House at the end of August. A longtime member of Bush's inner circle, Rove was nicknamed "the architect" by the president for designing the strategy that twice won him the White House.

Mattel issues a recall affecting more than 9 million toys made in China, citing magnets that could be swallowed and possible problems with lead paint. The company's Fisher-Price division recalled 1.5 million preschool toys from a different Chinese supplier earlier this month.

Widespread problems within the subprime loan market have created havoc on Wall Street, with a cascading effect through world markets.

Dr. Jerome Paulson, a pediatrician with the National Children's Medical Center in Washington, D.C., talks with Michele Norris.

Prime Minister Nouri al-Maliki announces the formation of a new alliance of Shiite and Kurdish parties in an effort to break Baghdad's political impasse. But no Sunni leaders are involved, and key Shiite groups are also not participating.