Star reporter Brady McCombs presents a five-part series exploring changes on the U.S.-Mexico border in the last 15 years and what has caused some of these changes.

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A borderline that for generations was like a picket fence between neighbors is now a wedge between old friends.

  • Brady McCombs Arizona Daily Star
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Ranchers in Southern Arizona's smuggling corridors used to have a "live and let live" relationship with illegal border crossers.

Like so many border cities, Douglas and Agua Prieta used to be one community. A physical and political line divided them, but it didn't get in…

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Outdoor recreation is a key draw to life in Southern Arizona. Every weekend, residents and visitors alike camp, hike, hunt and bird-watch. It's part of our identity and part of our economy.

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Doing business on the border used to mean courting Mexican shoppers looking for the latest in U.S. fashions and other goods. That still happens, but it isn't nearly as lucrative as it once was.

Read the transcript of Star reporter Brady McCombs' live chat today. He answered readers' questions about his series on life at the border and…