This description is about President Trump's plan to build a wall along the US-Mexico border. The wall is intended to stop illegal immigration and drug trafficking. It has been a major point of contention between the US and Mexico, with both countries having strong opinions on the matter. The wall is
From Wikipedia
A border wall has been built along portions of the Mexico–United States border in an attempt to reduce illegal immigration to the United States from Mexico. The barrier is not a continuous structure but a series of obstructions variously classified as "fences" or "walls".