Knoxville Biz Ticker: Comcast joins community organizations to launch 13 Xfinity WiFi-connected "Lift Zones" across greater Knoxville
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Siege. of the 378 border miles arizona shares with mexico, about 120 miles consists of 18-foot-tall pedestrian fences. most of the rest is lined with barriers like these. they keep cars and trucks out, but people? not really. >> i'm in the united states. i'm in mexico. >> right now you're in mexico. >> i'm in mexico. >> this is still a crossing location. >> the reason why they cross here so much, if you look real hard, you can see a tower. one of those towers. see them through the tree? >> the border patrol surveillance towers. >> the illegal people know they can walk up right on this side, co...