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A center for scientists to study what helps dogs succeed in search-and-rescue operations opens Tuesday at the University of Pennsylvania. Dr. Cynthia Otto, who created the center, and Annemarie DeAngelo, the center's training director, tell Fresh Air why they depend on their canine companions.

President Obama marked the anniversary of the Sept. 11 terrorist attacks with visits to the Pentagon and Walter Reed on Tuesday. The attack 11 years ago fundamentally restricted the American debate on national security and foreign policy. Those issues traditionally advantaged Republicans, but they've proven to be real assets for the president.

Melissa Block and Audie Cornish read emails from listeners about a daughter's connection to her father through Don McLean's album "American Pie."

Melissa Block talks to Jack Crayon, an environmental scientist at California's Department of Fish and Game, about odd smells that have invaded a large area in Southern California. He says it smells like the gases from the Salton Sea.

Audie Cornish talks to Bob Mondello about what's hot at this year's Toronto International Film Festival.

Online reviews of restaurants, travel deals, apps and just about anything you want to buy have become a powerful driver of consumer behavior. Unsurprisingly, they have also created a powerful incentive to cheat.

Ice covering the Arctic Ocean is at its lowest levels in decades, or quite possibly centuries. The new low has smashed the previous record, set in 2007. Scientists blame a long-term warming trend in the Arctic, and say that the change could alter weather patterns throughout North America and Europe.

The IRS has awarded a former banker $104 million for telling the U.S. government how Swiss banking giant UBS helped rich Americans evade taxes. The award given to Bradley Birkenfeld is believed to be the largest ever for an individual whistle-blower.

After years of lawmakers attempting to find solutions to the state’s underfunded pension problems, a group of Republican legislative candidates are hoping…

Chicago teachers entered their second day of a strike on Tuesday. Meanwhile, thousands of children were supervised by administrators for half a day.