us-mexico Why a Border Wall Would Do Little Besides Waste Money October 1, 2016 historyscoper http://www.rand.org/blog/2016/09/why-a-border-wall-would-do-little-besides-waste-money.html?adbsc=social_20161001_1028681&adbid=UPDATE-c165654-6187999358244446210&adbpl=li&adbpr=165654