Re-read your history. The oceans never protected us. Throughout the eighteenth and much of the ninteenth century, the U.S. was often surrounded by the possessions of hostile powers including the British to the North and the Spanish and French to the South and West.
You seem to be willing to believe and blindly follow Obama hook, line, sinker. That is your right but don't criticize me for daring to doubt the good intentions of our new maximum leader.
Don’t worry, Obama will wuss out, just like you.