Scenario: Last line of defense. I want to prevent anyone from reaching a highly guarded building.

Such building is in the middle of top secret, heavily guarded military area (think of [Area 51](http://en.wikipedia.org/wiki/Area_51)). I want to make sure, that if my military base gets attacked, I have a way to protect my utmost secret hidden in such building.

Can I deploy nuclear bombs around it and make directional nuke-blast facing away the building?

I want to destroy everything else than such building - I want to be able to recover my super secret stuff from such building after everyone is killed.

Also, if such attack happens, I want to make sure such defense "works against everyone". What are my possibilities? Please stay inside current technology level.

BTW, money is not an issue

Also, this secret is "stolen from my enemies". So I have to assume such military base will be attacked amongst first