"Chopper Takedown" Clip for WORLD WAR Z Starring Brad Pitt

If you haven't yet decided whether or not you're going to see "World War Z" this weekend, here's a new action-packed clip from the zombie thriller. The film stars Brad Pitt as a UN worker who has to travel across the world in a race against time to figure out how to stop a zombie epidemic. In this particular clip, a mission goes wrong when a swarm of zombies take down a military helicopter