The document discusses various border walls and barriers that have been constructed around the world. It notes walls built by Morocco, South Korea, India, Botswana, Saudi Arabia, Turkey, Thailand, Pakistan, Uzbekistan, and between the US and Mexico. It also discusses border structures between Spain and Morocco, and dividing Catholic and Protestant areas in Northern Ireland. The document argues that Israel's border wall with Palestine is unjustly called the "wall of shame" as it has effectively reduced suicide bombings by over 98% while other nations erect similar barriers for other security and economic reasons.