Guy In Sight News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Evacuated just as a precaution. luckily no one was hurt and no word yet on what sparked the fire. illegal immigration has become one of the hottest talking points of this election season with lots of presidential hopefuls offering up their solutions on how to tighten security at the u.s./mexico border. each location along the border has its own set of challenges. we have more now live in nogalas today. willi william. >> reporter: gretchen, i've covered immigration and been on this border countless times. the billions spent in the fence, aircraft, towers, cameras, it is paying dividends but i...

This is coming as border apprehensions are near a 40-year low, and we have a firsthand look at some of the most challenging border sectors with the first part of the series focusing on arizona and the problems facing agents there. william la jeunesse is live with more for us today. >> reporter: well, jenna, people ask me with all the billions we spend on border security, how do people still get through? one reason, spotters. right now we are being watched as is every border patrol vehicle that polices this fence. >> i've got a guy in sight. >> in sight? >> reporter: it looks like any other mou...

Another bunch of detainees in that nation instead of putting them in croatian shelters. we start off with a look at just how sophisticated the bad guys have become. >> i got a guy in sight. >> reporter: it looks like any other mountain in southern arizona, but it's not. >> that location is notorious for scout activity. >> reporter: look close. you'll see multiple caves filled with blankets, food and surveillance equipment. >> they're up there anywhere from five days to 30 days. >> reporter: they are spotters, who directed a bunch of immigrants north to evade the border patrol. >> they just dro...