The 652.6 miles of fences on the Southwest border

More than $7 billion has been spent so far on fencing and related infrastructure along one-third of the entire border (1,954 miles). But experts agree that building more would cost much more per mile, because construction would stretch into very isolated areas.

[ Story: Trump says building a U.S.-Mexico wall is ‘easy.’ But is it really? ]

Source: Congressional Research Service, DHS | The Washington Post July 17, 2015
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