The world has gone to hell, with the East Coast and Europe already lost in the latest TV spot for World War Z. Brad Pitt stars as U.N. employee Gerry Lane, who reluctantly leaves his family behind to help stop this widespread epidemic of hyper-violent zombies. As we learn in this video, whenever a zombie is killed, the rest become even more aggressive. Can Gerry find a way to stop the entire world from becoming zombies when this action-thriller hits theaters on June 21?