WASHINGTON, Aug 19 (Reuters) - Dozens of protesters broke through part of the perimeter security fence surrounding the Democratic National Convention on Monday, drawing riot police to the site, a ...

What types of fence are on the border today? So-called "pedestrian fences" are meant to stop people from getting through. There are three main designs: 1. Landing mat fences are built from Vietnam-era ...

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Download the MP3 audio version of this story here, or sign up for The Explainer’s free daily podcast on iTunes. The Senate will vote this week on whether to build 698 miles of fencing along the ...