A weapon more powerfull then a nuclear bomb
A nuclear bomb is one of the worlds most power full weapons and it could also be used as an energy source it power full enough to destroy a city so you might be asking your self  is there a weapon more better than it . I think there is

virus are more dangerous then your nuclear weapon because they can easily spread in a city without any one knowing and they are easily movable a person carrying a virus can go to other cities and spread the virus their it is less costly then making a nuclear weapon
beside you see their a international ban on virus but not on nuclear bomb and beside a nuclear bomb kill its pray easily while it on the type of virus you can kill quickly or slowly so what do you guys think.