Two days ago the CIA declassified a report on Area 51. The report does not mention aliens or there space craft. It is a extremely interesting report. It was released do to the Freedom of Information Act.
One thing I find interesting is that this report is only marked secret
Here is the report for you
http://www.scribd.com/doc/160716580/CIA-Report-That-Reveals-Area-51.
Here is a conspircy theory about why they were willing to declassify:
I believe to the best of my knowledge that Area 51 was a highly productive base do to the extremely advanced areonatical research done and aircraft build (U-2 and SR-71)
Considering this i believe that there are highly classified aircraft being developed by the United States at this moment. Now if you were wanting a highly secret plane developed were would you do it. Most of us would say Area 51 possibly the government also or would they.
Now lets take in to consideration that the Russians, Chinese and other Foreign Governments have spy satellites. They would be programmed to look at Area 51 on pass over. Or whenever they get close enough to see. Ok now if you are wanting to hide this planes from the satellites wouldn't this mean that there to many of them to avoid safely. Not to mention all the bird watchers at the fence also.
SO it is my belief that the government has found that Area 51 has received to much publicity and has decied to reveal it while they start another base quietly to continue there research and building of planes.
YESS there HAS to be another BASE down the line of Area 51
What do u think