From this:

A multibillion-dollar "virtual fence" along the southwestern border promised for completion in 2009 to protect the U.S. from terrorists, violent drug smugglers and a flood of illegal immigrants is a long way from becoming a reality, with government officials unable to say when, how or whether it will ever be completed.

More than three years after launching a major border security initiative and forking over more than $1 billion to the Boeing Co., the project's major contractor, Homeland Security Department officials are re-evaluating the high-tech component of the plan in the wake of a series of critical Government Accountability Office (GAO) reports warning lawmakers that the expensive undertaking is deeply flawed...