How far should the offsite storage location be? A disaster that would strike and cripple the whole city, then no place is secure within that city.

Perhaps organisations need to look to storing data half way across the world. Or at least, have a copy of their databases sent across to atleast 3 continents. (organsations in US, could have their data sent to a city in Asia, Europe and Australia) - This is a surefire guarantee atleast. 🙂