The Real Barriers to Trump's Big "Wall"

An Engineer Explains Why Trump’s Wall Is So Implausible from National Memo
"The challenge of Trump’s border wall is not technical, but logistical. The leap in complexity between “building a wall” and “building a 2,000-mile-long continuous border wall in the desert” is about equal to the gap between “killing a guy” and “waging a protracted land war.” Trump’s border wall, if built as he has described it, would be one of the largest civil works projects in the history of the country and would face an array of challenges not found when constructing 95-story skyscrapers. ... In order to adequately answer Mr. Ramos’ question, let’s first make some assumptions on the project’s scope"