In 2006, Congress passed a law to spend more than $7 billion to build a fence to secure our Mexican border. Less than two weeks ago, Homeland Security Secretary Michael Chertoff announced at a news conference that a high-tech "virtual fence" project along part of the U.S. border with Mexico finally was ready for service as a substitute for an actual physical fence — you know, concrete, barbed wire, watchtowers, moats.

The secretary was very specific. He said: "I ha ...

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