SAN DIEGO — Move over vampires, goblins and haunted houses, this kind of Halloween terror aims to shake up even the toughest warriors: An untold number of so-called zombies are coming to a counterterrorism summit attended by hundreds of Marines, Navy special operations forces, soldiers, police, firefighters and others to prepare them for their worst nightmares. “This is a very real exercise, this is not some type of big costume party,” said Brad Barker, president of Halo Corp, a security firm hosting the Oct. 31 training demonstration during the summit at a 44-acre (18-hectare) Paradise Point Resort island on a San Diego bay. “Everything that will be simulated at this event has already happened, it just hasn't happened all at once on the same night. But the training is very real, it just happens to be the bad guys we're having a little fun with.” Hundreds of military, law enforcement and medical personnel will observe the Hollywood-style production of a zombie attack as part of their emergency response training. “No doubt when a zombie apocalypse occurs, it's going to be a federal incident, so we're making it happen,” Barker said. Since word got out about the exercise, they've had calls from “every whack job in the world” about whether the US government is really preparing for a zombie event. Called “Zombie Apocalypse,” the exercise follows the federal Centers for Disease Control and Prevention's campaign launched last year that urged Americans to get ready for a zombie apocalypse, as part of a catchy, public health message about the importance of emergency preparedness. Joe Newman, spokesman of the watchdog organization Project on Government Oversight, said he does not see the zombie exercise as frivolous. “We obviously are concerned about any expenditure that might seem frivolous or a waste of money but if they tie things together, there is a lesson there,” Newman said. “Obviously we're not expecting a zombie apocalypse in the near future, but the effects of what might happen in a zombie apocalypse are probably similar to the type of things that happen in natural disasters and manmade disasters. They're just having fun with it. We don't have any problems with it as a teaching point.”— AP