Associated Press: Fox News is collaborating with SiriusXM to launch a 24-hour news service that will update satellite radio listeners and mobile device users on headlines every 15 minutes. The service, to launch Oct. 5, is Fox’s most high-profile new business venture since the Fox Business Network was started in 2007. Fox is hiring 40 to 50 new journalists and building a new newsroom for the operation. Fox News Headlines 24/7 will be streamed online and available to people through an app that can be paid for separately from SiriusXM’s main service.