Like WWII movies, zombie films are a dime-a-dozen. Everyone is so familiar with the real-life history involved that they practically write themselves.
Actual WWII footage suffers from grainy, black-and-white film stock so you rarely see actual footage used anymore. Zombie films deal with a contemporary crisis and have the advantage of thousands of teams of professional news and amateur photographers.
The 2004 remake of Dawn of the Dead
Some have argued that using this real footage so soon after the real-life events was exploitive, but it got the point across even if the rest of the movie contained common fallacies.
Take a look at the (slightly disturbing) clip of the film's compelling opening above. Even if you don't like the content, you can't argue with the use of Johnny Cash
I can argue against the use of Johnny Cash. I don't like him. He supports the War on Zombies. Despite all of the information available to people, apathy and ignorance still run rampant in this country. How else do you explain the support for the War on Zombies for the next presidential election? A lot of people think Hillary is going to end the War on Zombies, despite her actions and voting record proving that she has no intention to. A lot of people (apparently, I have yet to meet an actual Giuliani supporter) think Giuliani is the savior of the War on Zombies, despite the fact that he did a terrible job in the last outbreak.