We do not see any bombs, ever. Hiroshima was not a safe place to be for a goodly amount of time. They closed the Trinity site to tourists long ago. They have evacuated Chernobyl and the Japanese reactor sites, and no one proposes bombing them to disperse the radiation.
Bombing Ira would be very stupid. Nuking Iran would be stupid squared. Even if it were "safe" to nuke Iran, all the press would be against it, and us, for a very, very long time.
Nuclear weapons render places unliveable, if not in reality, in everyone's imagination.