Glitch Renders 'Virtual Fence' Unusable

(AP) -- Because of a software glitch, the first high-tech "virtual fence" on the nation's borders remains inoperable, three months after its scheduled debut.

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<p><a href="http://www.physorg.com/news109483800.html">Glitch Renders 'Virtual Fence' Unusable</a></p> <p>(AP) -- Because of a software glitch, the first high-tech "virtual fence" on the nation's borders remains inoperable, three months after its scheduled debut.</p>