Well, leaving aside the fact that it would be FAR less expensive for him to purchase one from Russia than to make one of his own, the only thing stopping him would be the time and cost involved...well that and obtaining the fissionable material.

Building the bomb itself really isn't that hard. Plans are available all over the 'Net and MIT used to get at least one physics student a year who did that until the school implemented policies disallowing that particular project.

The specific tool someone wants is not the problem. It is the person who has the tool, and how he chooses to use it that is the problem.

Nobody ever said freedom came without responsibility or consequence - or risk. If you believe it does, you're sadly mistaken.

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In case you were wondering, yes, there really ARE more idiots these days....technology has made natural selection obsolete.