Recent observations from Google Earth....

If in fact Area 19 or 51 have large underground facilities, there has to be evidence of the massive amounts of dirt and rock removed from underground to create space for whatever. Also, if these sites were used for underground bomb testing, this process would also be similar to how underground mines are made - by blasting. Interesting enough, these sites have something in common. There are several large and similar built-up berms and piles of dirt on the outskirts of both these areas. Area 51 has many. Also, near Area 19, southwest of Hot Creek Valley, just off Hwy 375 there appears to be a brand new blacktop runway at least 7,000 ft long and no hanger facilities? In the middle of nowhere. That's long enough for a F-22 or ? Check out the satellite dish off to the left and the strange spoke markings on the right. There is also a compound south of the runway which appears to have barracks or similar buildings? Could be a construction site. Seems a bit much for a flying rancher or recreational plane. North of Area 19 is the UC-4 well head. Not sure what activity went on there but the government sign says "no drilling". Also note at the entrance to the two roads to the Area 19 that connect to Hwy 375 (the ET Hwy) each have a bar or gate across them. Also directly south of Area 19 looks like an old runway or launch/landing site? I'm no engineer, but it seems throughout history, mankind will continue to leave clues of his progress for others generations to discover. Over and out.