TECHNOLOGY work both ways..... Should make the oceans even bigger for the enemies of the USTruth is constant-different PLACE in the dimension called TIME.
Back then, both the Atlantic and Pacific Oceans
were HUGE BULWARKS---(remember the great wall
of china?------same superannuated idea) I trust
logic, and truth
silly answer. The protection afforded a land mass by
an INTERVENING ocean------does not remain a constant over time and TECHNOLOGY
MARCH ON----enlarge the OCEANS-----start digging and pumping water !!!!!!!!