Des Moines Register: Managers at the Bridgestone-Firestone tire factory just north of Des Moines sent workers home Sunday after learning that hackers may have compromised the international corporation’s data systems. Emily Weaver, director of communications for Bridgestone Americas, said in a statement today that company officials are investigating the “information security incident.” She said Bridgestone managers disconnected computers at many Latin American and North American factories, though she did not say which locations the company thinks were hacked. With about 1,300 workers in Des Moines, Bridgestone Corp. is one of the largest manufacturing employers in the metro area.