Worst case scenario, my great great etc. grand kids might grow a third eye, or something.
Btw, I don't know if you thought about it, but just about every conceivable scenario of alien assault and radioactive nastiness has been covered by an episode of the Twilight Zone or Outer Limits. Been broadcast since the 50's, so any potential alien attacks will be thwarted because they will realize we are on to their tricks. Rod Serling has saved us!