Look at Cuba for instance...............on the Atlantic side...............anything that comes from the East.............Africa.........Europe.............from the Atlantic to the Americas...........and wants to go, via the oceans..........to Mexico...........would have to pass either North or South of Cuba................

I really don't think u understand............................

Also...........ignore political boundaries...............adn concentrate on just geography.............and geographic regions.....................now look at Central America........(part of N. America)............and the surrounding areas...........