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Tonight on 'Nightline'

April 23, 2008

Fencing the Border

In the quest to secure the 2,000-mile-long U.S.-Mexico border, the Department of Homeland Security has embarked on a massive construction project to build a 15- to 18-foot-high wall along large swaths of the territory. But a lot of south Texans are roaring mad about the plan. The proposed path of the fence cuts directly through residents' backyards and even a local golf course. How much do Texans stand to lose in America's pursuit of border security? ABC's John Donvan reports. Read more here.

Marathon of the Sands

For six days each year, daring individuals from around the world descend on Morocco for a 150-mile race across the open desert. It's called the Marathon des Sables, and it's the toughest footrace in the world. Entries in the competition battle triple-digit temperatures and shifting sands while carrying everything they need, except water, on their backs. What motivates people to run the race? ABC's Clarissa Ward reports from Morocco. Read more here and view the slideshow.

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