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Former Truck Driver Reconstructs A-bomb
mdsolar writes "Coster-Mullen taught himself how to build an A-bomb. 'The secret of the atomic bomb,' he says, 'is how easy they are to make.' His findings are available in a book he continuously updates and publishes himself called Atom Bombs: The Top Secret Inside Story of Little Boy and Fat Man, which has received rave reviews from the National Resource Defense Council: 'Nothing else in the Manhattan Project literature comes close to his exacting breakdown of the bomb's parts.'"
which are a rather simple design; among other things, they don't have any safety features.
Broadly, what you need is two correctly sized-and-shaped chunks of enriched uranium with enough U-235 to cause a chain reaction, a smoothbore gun barrel (IIRC Little Boy used one of 6" diameter), and some gunpowder in silk bags to drive one piece of uranium into the other. There are a few other parts to this, such as the tamper and the fuze, but the toughest part should be obtaining enough enriched uranium.
Certainly the featured bomb is not a fully-working model. It'll be a reproduction with inert material standing in for the U-235, no gunpowder, and an inert fuze.
Hail Eris, full of mischief...
E pluribus sanguinem
Not really, everything including technical schematics from the Manhattan Project have been available for decades. The knowledge of how to make a simple gun design device isn't what keeps people from making nukes, it's the availability of highly enriched uranium.
There are 4 boxes to use in the defense of liberty: soap, ballot, jury, ammo. Use in that order. Starting now.
Apparently you missed this and this and this and this and this and and and and
People in cars cause accidents....accidents in cars cause people
So maybe this is a case for Mythbusters?