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Without our interstate highway system, the United States would have far fewer suburbs, fewer fast-food joints, and "just-in-time" production would be all but unknown in America. The second of a four-part series explores how the vast road system has changed America, for good or ill.

Bill Gates founded Microsoft on the dream of putting a computer in every home and office. He says he built his company on the belief that technology, creativity and intelligence can change the world.

Consumer prices jumped sharply in September, recording their biggest increase in more than 25 years. Soaring energy costs fueled most of the increase. But other signs suggest the steep rise in fuel prices isn't spreading to the rest of the economy -- at least not yet.

Reconstructing the damaged infrastructure of the Gulf Coast is a focal point for the Bush administration. Mark Schleifstein, staff writer for the New Orleans Times-Picayune, says many who lost their homes or saw severe damage are still unclear on how much of the city can be saved.

Of all the groups in the micro-melting pot of South Louisiana hit by Hurricane Katrina, it's hard to find a more close-knit community than the Islenos. The descendants of Spanish-speaking Canary Islanders who settled St. Bernard Parish more than 200 years ago are now struggling to restore a community that was dispersed by Katrina's winds and floods.

Commentator Jeremy Rifkin thinks it's time to get the hydrogen economy into high gear. He says that in order for the United States to rid itself of its fossil fuel dependence, it needs to launch a program similar to President Kennedy's space race, where science, commercial interest and the federal government combine their efforts to accomplish a grand vision.

Harvard University's Lawrence Summers announces that he will resign at the end of the academic year. The move comes a week before the Faculty of Arts and Sciences was expected to take a second no-confidence vote on Summers, who has been criticized for his abrasive personality and intemperate remarks.

Table-saw accidents send more than 60,000 people to seek medical treatment every year, according to federal estimates. In an effort to get the power-tool industry to adopt safer technology, SawStop inventor Steven Gass visited the Consumer Product Safety Commission near Washington recently.

A roundup of key developments and the latest in-depth coverage of Russia's invasion of Ukraine.

Defense attorneys for former Enron executives Kenneth Lay and Jeffrey Skilling make passionate closing arguments on their clients' behalf, ridiculing the prosecution's case. The jury gets the case today.