The world has a lot of famous border walls. CNN looks at how they compare to President Donald Trump's proposed US-Mexico wall.
원문출처 : http://www.cnn.com/videos/world/2017/02/15/trump-and-history-of-walls-ejk-orig.cnn
원문출처 : http://www.cnn.com/videos/world/2017/02/15/trump-and-history-of-walls-ejk-orig.cnn