The zombification of America got its start in 1968, when George A. Romero and a bunch of his friends and colleagues released Night of the Living Dead, the scrappy little horror movie that could not only serve as patient zero in the ongoing pop-cultural zombie apocalypse, it also revolutionized horror as a genre and marked the birth of a new era in independent filmmaking. Now, 45 years later, Birth of the Living Dead (available on iTunes) shines a light on the film's creation, the turbulent world that it was born into and its enduring influence to this day, both within the zombie genre and in the larger world. We spoke with executive producer Larry Fessenden about what to expect from the doc, how it came to be and why Night of the Living Dead still has such an impact.Birth of the Living Dead.