Pbs Newshour: u.s. Puts Up Real Barriers to "Virtual Fence" Along Mexican Border

The U. S. government had plans to build a "virtual fence" along the U. S.-Mexico border. Costs and other factors led to led to its replacement. This article highlights the financial and technical problems associated with the project and more cost-effective ways of securing the border. Educational resources are included. (2 April 2010)