Since the mid-1990s, the US has built fencing at various points along the southern border in an attempt to deter would-be immigrants from Mexico. Building the fence isn't cheap. On average, each mile of border fence costs US taxpayers about $4 million to build and will cost another $6.5 billion over the next 20 years to repair and maintain.

Are we getting our money's worth? Is the border fence an effective deterrent? To find out, I asked two young women—both only about 5'5"—to see if they could climb the wall. Check it out...