I hate to be that guy I really do, But the strategy is paramount in national security. It can not be said, By anyone, That Area 51 is a "Secret Base" For decades now Area 51 has been a large reason anyone even bothers to go to Nevada, Outside of the casinos and Hookers I mean. I think it would be a very logical conclusion that if there is anything "Top Secret" at all in Area 51. It would be older late 80's jet propulsion technology, That just still happens to be sitting around down there.
Trust me, Strategy doesn't work as people want it too, The government doesn't conduct top-secret business behind a red Curtain marked Top secret. Area 51 is approached at safe distances hundreds of times a year by the populace, Any possible application we could have that could truly be a valuable asset to national security wouldn't be sitting under a blanket with a bullseye painted on it, As the Entire area 51 seems to be. It would just be ignorant for any strategic operation to put valuable things in a place so carefully observed by the public. A best possible scenario is, They storm area 51 and find a skeleton crew of maybe twenty people tops just keeping the place clean and operational, If it's on a Wednesday maybe they will get really lucky and run into the guy that cleans the windows, He may have a few stories about the things he's seen there over the years lol.