Are you counting on capitalizing on the paradox, namely foreign cities with a .US TLD? (i.e. the effect of events over there on the US; survivers who might have moved to the US since, etc)..
>>These two cities have a unique relationship to the US that had a profound impact for the entire world over more than 50 years.
If you're using the term 'unique relationship' as a euphemism for dropping nuclear bombs on them, do you really think they want to be reminded of that relationship? I've visited the Hiroshima Memorial at ground zero and the message I came away with was one of profound sadness over the loss of life and destruction that nuclear war can bring.