Dug Under News Today

Can be tested. and then they will go at them, seeing whether they can be scaled, climbs, dug under, or breached. you will test these walls to their maximum? >> correct. >> reporter: on the mexican side of the border building of the prototypes met with disbelief. when you see these, what do they represent to you? >> for our country, we think its -- >> reporter: victor clark, a mexican citizen who teaches at san diego state university says a 30-foot wall would deter m migrants but not everything. ...