Detailed text transcripts for TV channel - CNN - 20171029:09:16:00
Available. cnn's chief medical correspondent dr. sanjay gupta examines whether a border wall could help stop this crisis. >> what is first thing that flags this? >> sometimes the driver's behavior, unnaturally nervous for crossing the border, sometimes it is the car that hasn't crossed the border a lot or the car crossed the border too often. >> reporter: what you're witnessing here are efforts in stopping drugs from coming through the u.s. mexican border. >> almost every car crossing is crossing for a legitimate reason, small percentage that comes in carrying contraband, but i think when the ...