It seems to me, that the Star Wars galaxy, as advanced as it was, would have figured out how to split an atom. As such, would have figured out how to use it as a bomb. It just seems to me that having tactical nukes in your arsenal would be a wise military decision. If a bombardment of standard torpedoes can take down the shields to a Star Destroyer, wouldn't the sheer destructive power of a nuclear missile work better? Given the size of the Executor, standard attacks would have been ineffective...The EU spent a great deal of time trying to sell the idea that Super Star Destroyers were incredibly powerful, and extremely difficult to destroy. Iron Fist and Lusankya come to mind. However, perhaps instead of trying to take out Star Destroyers or Super Star Destroyers using X-Wings, smuggle a nuclear weapon on board and detonate. Instead of needing to send the Falcon in to destroy the DS II, if you could get a nuclear device inside the Death Star, shoot...send an unmanned shuttle with a nuke inside, let the Imperials take it in with their tractor beams, like they do with the Falcon in ANH, and detonate it in the hangar bay. It wouldn't destroy the entire DS, but it would remove a considerable chunk, and either significantly damage the Death Star, or cause enough havoc so the the Death Star is completely dead in space. This would apply to Trade Federation Command ships as well...Their shields are fine against the lasers from Naboo fighter, but would they hold up against a nuke? If our primitive technology allows us to destroy an entire city with one shot, there is no reason to believe that with their technology, they can't build an effective nuclear device. They can build a Death Star that can completely obliterate planets, turning them into asteroid fields, surely they can harness the power of the atom to create a weapon more powerful than a torpedo, but not quite Death Star power.