It’s yours if you can get it out!
That’s what they say, anyway.
3M created an advertising campaign where they stacked 3M in US currency inside of 2 sheets of bullet proof glass. Supposedly if you can break it, you can have it.
Why wouldn’t someone just use a stick of dynamite or a huge drill press that goes through concrete and metal?
Either way, here is a pic of some people trying to get at it: