AP - A power failure that plunged large parts of Florida into the dark this week was caused primarily by human error, the state's largest electric company said Friday.

AP - Attorney General Michael Mukasey refused Friday to refer the House's contempt citations against two of President Bush's top aides to a federal grand jury. Mukasey said White House Chief of Staff Josh Bolten and former presidential counsel Harriet Miers committed no crime.

AP - Authorities on Friday confirmed that the deadly toxin ricin was found in a motel room most recently occupied by a man who has been in critical condition with breathing problems at a hospital for more than two weeks.

AP - A 17-year-old boy was arrested Friday and charged with fatally shooting his mother, who was a sheriff's deputy, and his two small sisters, authorities said.

AP - John McCain is refusing to renounce the endorsement of a prominent Texas televangelist who Democrats say peddles anti-Catholic and other intolerant speech.

AP - Recasting what would keep her campaign alive, Hillary Rodham Clinton's advisers said Friday that if rival Barack Obama loses any of Tuesday's four presidential primaries it would show Democrats are having second thoughts about him.

AP - Dogs may have a hard time wrapping their paws around this one: Robotic competition is nipping at their heels in the man's-best-friend department. A study by Saint Louis University found that a lovable pooch named Sparky and a robotic dog, AIBO, were about equally effective at relieving the loneliness of nursing home residents and fostering attachments.

AP - Naomi Campbell was released Friday from the hospital where she underwent abdominal surgery. The 37-year-old British supermodel, a frequent visitor to Brazil, was admitted for an emergency operation Monday.

AP - The Philadelphia Eagles landed what was considered the biggest prize in this year's NFL free-agent sweepstakes. The New York Jets traded an unhappy defensive player to New Orleans and traded for one from Carolina.