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The U.S. government has spent billions of dollars cleaning up highly toxic plutonium waste in Hanford, Wash., where much of the fuel for the nation's nuclear weapons was produced. Over budget and behind schedule, the project has ground to a halt. Some worry the government will give up on cleaning up the site completely.

President Bush travels to Aurora, Ill., to sign the $286.4 billion transportation bill. The bill is two years overdue and includes about 6,000 pet projects for lawmakers' home districts.

Casting directors recently held auditions for comedian Mo'Nique's reality show Fat Chance in New York, Atlanta and Los Angeles. Teshima Walker figured she'd try to become one of the finalists.

Peter Jennings, longtime anchor of ABC's evening news program, died Sunday in New York after a battle with lung cancer. He was 67. Jennings dominated the nightly news ratings from the late 1980s to the mid-1990s. Before assuming the anchor chair, he was a well-traveled international correspondent.

Detroit Mayor Kwame Kilpatrick trails his challenger in Tuesday's nonpartisan primary, according to the latest polls. Kilpatrick has struggled with budget problems and questions over his personal conduct. Quinn Klinefleter of member station WDET reports.

NASA's latest voyage to the planet Mars is underway. An Atlas V rocket carrying the Mars Reconnaissance Orbiter blasted off on time following two days of scrubs due to technical glitches. The orbiter will take about seven months to get to Mars, and will circle the planet for four years.

South Korean scientists report a major advance in the production of stem cells for medical research. Scientists say they have discovered a more efficient method for making new cells. In the United States, embryonic stem cells are at the center of a political and ethical debate.

The "Chicago Boys" -- Chilean men who studied free-market economic theories at the University of Chicago in the 1950s and '60s -- are often credited for Chile's relatively healthy economy. Chicago Public's Catrin Einhorn reports from Santiago on their legacy.

The Army may have met its recruiting target for July, but the year-to-date goals have not been met. The Army Reserve and the National Guard have also suffered shortfalls in their recruiting missions. Can the United States continue to rely on an all-volunteer army? Melissa Block talks with Laurence Korb, a senior fellow at the Center for American Progress.

NASA officials say the agency's engineers have found no easy answers to the problem of falling foam during the liftoff of space shuttles -- and a scheduled September launch will likely be delayed. Two NASA engineering teams reported on the problem Thursday.