Pittsburgh cancer center warns of cell phone risks PITTSBURGH - The head of a prominent cancer research institute issued an unprecedented warning to his faculty and staff Wednesday: Limit cell phone use because of the possible risk of cancer. Prosecutor: DNA clears JonBenet Ramsey's family BOULDER, Colo. - Prosecutors cleared JonBenet Ramsey's parents and brother Wednesday in the 1996 killing of the 6-year-old beauty queen, saying they were "deeply sorry" for putting the family under a cloud of suspicion that hung heavy for more than a decade. Wildfires force firefighters to pick their battles SAN FRANCISCO - With hundreds of wildfires raging across remote, rugged parts of California for a second week, fire officials have been forced to strategically choose which to fight and which to leave to burn for weeks or even months.