Data fusion

I was reading yesterday and two facts came together in my head.

First, from "A Day Without Seapower and Projection Forces":
almost 90% of the world's population lives within 500 miles of the ocean

and

from an aviation week article about future technologies:
with hypersonic vehicles we can hit targets 500 nm away in less than 8 minutes

I am going to assume the Navy guy was talking about 500nm, so that means, almost 90% of the world's population would be at risk of attack in under 8 minutes if we have hypersonic vehicles.