But what is that theory? The idea is that such weapons would produce considerably less radioactive by-products than current designs of nuclear weapons but, in turn, they would release a huge number of neutrons. The big question is: Should we allow such weapon designs to go ahead and how scared should we be if we do and how scared should we be if we don’t? To best deduce answers to all these questions, we first need to understand what 1st, 2nd and 3rd generation nuclear weapons are. But before th