FBI spokesman Peter Lee said agents did not know if suspect Ryan Kelly Chamberlain II, 42, is carrying explosives, but he is considered armed and dangerous. Chamberlain is likely driving a white Nissan Altima with either California or Texas license plates 7FQY085 and BX9M042 respectively, Lee said. Chamberlain is 6-foot-3 and weighs 223 pounds with brown hair and blue eyes. He was last seen wearing a hooded sweatshirt and blue jeans, Lee said. Authorities said anyone who encounters him should call 911 rather than approach him. Lee said agents believe Chamberlain was acting alone. Authorities declined to describe the type...