For an exercise in futility, go play checkers against a computer program named Chinook. Developed by computer scientists at the University of Alberta in Canada, Chinook vanquished human competitors at tournaments more than a decade ago. Now, in an article published today on the Web site of the journal Science, the scientists report that they have rigorously proved that Chinook, in a slightly impro
A Pakistani soldier standing guard at a base in the tribal area of North Waziristan. Since last September, a cease-fire between Pakistan and tribal groups has been in effect, and troops have kept close to their bases.Credit...John Moore/Getty Images WASHINGTON, July 17 — President Bush’s top counterterrorism advisers acknowledged Tuesday that the strategy for fighting Osama bin Laden’s leadership
Fissures in the ground were visible in front of the Kashiwazaki nuclear power plant on Tuesday.Credit...Franck Robichon/European Pressphoto Agency TOKYO, July 17 — Japanese authorities today suspended the operation of a nuclear power plant after a radiation leak and other damage from a deadly earthquake on the nation’s northwestern coast raised new concerns about the safety of Japan’s accident-pla
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