The problem with the idea of doing a test of a nuclear device is where to do it.

Las Vegas has grown in the direction of the test site. Even back in the day, it was awfully close.

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There just aren't big enough spaces.

And would the test be underground? That requires a lot of drilling and instrumentation that would pretty much have to be invented from scratch.

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Not to mention that nobody working for the national labs has ever done a test. There are a few oldies around, but testing is a lot of work. The newbies would have to learn a lot, fast.

So there's no way to do a quick test. Sorry, Donny.
https://nucleardiner.wordpress.com/2016/03/14/what-it-would-take-to-restart-american-nuclear-testing/

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