The Berlin Wall kept people in - the Mexican Wall keeps people out
There is something about the “Berlin Wall” that many people have no clue about.
Most people think the “Wall” divided East from West, when in fact Berlin was a divided city that was wholly contained within EAST Germany.
An Island, if you will, a pocket of the West that was able to exist in a Communist State by the virtue and will of free men and the Soviets allowed it’s existence as a result.