Walls around the world: the barriers being built to divide people - Telegraph
▻http://www.telegraph.co.uk/news/worldnews/northamerica/usa/11795349/Walls-around-the-world-the-barriers-being-built-to-divide-people.html
Pas sur que ce soit exhaustif, mais c’est au moins un élément du puzzle.
Walls around the world: the barriers being built to divide people
Donald Trump’s proposed “Great Wall of Mexico” is not the only construction project aimed at keeping people apart