Somewhere deep in the bowels of Apple HQ lives the official antenna testing facility. And although One Infinite Loop is usually on serious lockdown, Apple released some footage and images of its inner workings during yesterday's press conference. The video, which is now live on Apple's website, profiles the 17 different chambers within the lab, which are all lined with a carbon-impregnated foam (no joke) that eliminates signal bounce and echo, giving these labs the most accurate antenna performance readings possible. It's all very sci-fi looking, and it's a bold move on Apple's part to show customers how far it goes to deliver quality products. Check out more images of the facility below!