the risk isn't 0.000001%. it's more like 1% if you take into account all accidents and the total number of plants. ok, newer plants are safer but at the moment the risk still is 1% with all the old crappy ones around. russia even still runs many chernobyl type plants.

a dirty bomb doesn't consist of tons of material. such comparisons are silly.

@joozey: those commercial "space" flights use rockets too. they just don't start from the ground but from an airplane. and they basically just are longer parabola flights. they aren't able to reach an orbit and they probably won't anytime soon since if it would be that easy they would have gone into space that way much sooner. i guess this still will take a lot of research in scramjets and such stuff.

i also remember how my mother pulled me out of my sand pit and put me under the shower for half an hour as a kid.

edit:
who will build the sarcophargus in japan if worst comes to worst? this isn't the inhuman ussr where 100000s of soldiers can be forced to do it.