The center's crash hall is designed specifically for high quality photography. It has a custom lighting array to produce diffused light that prevents hard shadows. The IIHS also uses a networked array of slow-motion digital cameras, which it refers to as digital imagers, that all begin filming at the same time when a test begins.
It's a fascinating and scientific process that aims to set a world standard in crash testing. Scroll down to watch some high-quality shots of cars getting smashed and gain a better understanding of what the IIHS does.