ST. PETERSBURG, Florida (AP) -- A gunman fatally shot two people and wounded a third inside a Radio Shack store at a strip mall Thursday night, then shot himself to death, police said. Another customer and an employee managed to escape uninjured from the store at the Gateway Shopping Center, police spokesman Bill Proffitt said.Police did not identify the gunman, but police spokesman George Kajtsa said the man "had some mental issues, according to his family.""He was involved in some kind of a road rage incident today that the Pinellas County Sheriff's Department is investigating," Kajtsa said. He had no...