Trump administration's $46 billion ‘smart wall' races ahead on U.S.-Mexico border

Trump administration's $46 billion ‘smart wall' races ahead on U.S.-Mexico border
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For decades, all that separated the U.S. from Mexico was barbed wire. Now, after a massive infusion of cash from Congress, President Donald Trump’s administration is swiftly building what it has dubbed a “smart wall,” a combination of 30-foot-tall steel fencing and an array of sophisticated te...