1. K8 fence can stop a 15,000 pound truck going 40 mph
While the outside of the center is innocuous enough, it looks like a two storey office building, more observant passersby might recognise some tell tales that hint at the valuable contents. Besides the general lack of windows, the building is surrounded by an earthen berm designed to shroud the facility, deflect explosions and help tornadoes hop the building (which is hardened to withstand winds up to 175 mph). And if they know anything about security, they might recognise the fence as a K8 system that can stop a 15,000 pound truck going 40 mph in one metre.