Trump’s border security measures go far beyond just a wall. Here’s what to know

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MCALLEN, Texas — The Trump administration has moved expeditiously in its second term to put up not only a border wall along the U.S.-Mexico border, but also to build out a comprehensive security system, which Americans know little about.

Legal delays and poor planning meant that in President Donald Trump’s first term, he did not install 1 mile of border wall in an area that did not previously have it for almost the first three years.

This time around, more than 20