Here is the oddity. Ronal Reagan famously said, "Mr. Grobochev tear down this wall". Since then iron curtain has fallen. However US military has added walls in Baghdad, Israel has added huge wall in the west-bank !

The separation died out in South Africa but until recently there were roads in Gaza and West Bank on which only Jews were allowed to drive.

World is crazy, it tears down in only place, only to erect the same thing on the other side.