The Congressional Research Service and studies by U.S. Customs and Border Protection found that the U.S.-Mexico border wall that exists today cost $16 million to $21 million per mile. In several spots, it’s also undermined — literally — by narcotraffickers. Critics including former Texas Gov. (and former Presidential candidate) Rick Perry say the price and logistics are unworkable. Other critics believe it’s un-American, with Vice President Joe Biden saying “building walls is fundamentally contrary to what made this country what it is.” But the United States is just one of 65 nations choosing to wall its borders. That’s four times as many nations as when the Berlin Wall fell.
