One of Donald Trump’s most controversial campaign promises is to build a wall on the border between the United States and Mexico in an attempt to control illegal immigration.
Trump’s idea has been nothing short of divisive among American voters, but the idea of erecting walls and fences to prevent people from illegally entering a country is nothing new. In fact, new border walls are being built all over the world today, and more are in the planning stages.
Here’s a list of just a few of the border barriers that are either being built or are under preparations to be built in the near future:
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