Big new hanger at Groom Lake (aka Area 51)

The new hanger is recently closed in. Siding and roof are up, which is most of the work, there is little finish carpentry to do in an aircraft hanger. It's 185 by 350 feet, large enough to accept most large aircraft such as B1, B2, c17. The interesting part of the Aviation Week article is how little they really know about what's going on inside the Groom lake fence. They describe earthworks and towers, all "purpose unknown". The best photos come from commercial satellites, available to anyone. Aviation Week has a well earned and longstanding reputation for knowing nearly everything. In this case it looks like Groom Lake security has been tight enough to foil even Aviation Week.