Hello !Dr., That's just description of chain reaction from school course of physics, every kid know that from age 14. It's impossible to find somewhere in universe 2 kilos of pure plutonium. So, impossible to built nuclear bomb with wight less then 40-50 kilos, and definitely impossible to built it in stainless steal (why you need to steal them ? :) ) salad bowls. DJB> 4 stainless steal salad bowls (5 - 8 inch diameter) DJB> 10 pounds of U-235 (Plutonium) DJB> 1 containment cylinder in which to fit the salad bowls DJB> ? some explosives - C4 platic works best - but TNT or gun powder is DJB> acceptable. DJB> Assembly [...] LOL ! To be realistic - everyone can built BIG bomb with ammony, acetone and sugar - things from nearest supermarket. Not as big as nuclear one, but enough big to destroy building. -- Best regards, Sergei mailto:folio@infocom.zp.ua