Labels:text | screenshot | font | number OCR: Proving Range. The roughly Z-shaped collection of single storey buildings were all joined by underground walkways. The bomb-proof plate glass windows set in the walls were carefully angled so as to reflect any light which shined upon them downwards, and there were no easily visible entrances or obvious access points of any kind. The entire exterior had been covered with natural looking fibreglass rock faces, and was regularly 'dusted' with a mixture of gypsum and adhesive. Simple camouflage which made it almost indistinguishable from the surrounding desert. In addition, the Sand Box was ringed with buried sensors and mobile surveillance mechs. But tight as the security net was, it had its weak spots, one of which was missile launches. Whenever the USAF tested a new rocket, the thunderous v ...