"In 2005, the Secure Border Initiative Network (SBInet) was conceived as a
surveillance technology to create a 'virtual fence' along the border.
After spending nearly $1 billion, DHS deployed SBInet systems along 53
miles of Arizona's border that represent the highest risk for illegal
entry. In January 2011, in response to concerns regarding SBInet's
performance, cost, and schedule, DHS cancelled future procurements. CBP
developed the Arizona Border Surveillance Technology Plan (Plan) for the
remainder of the Arizona border. Funding for this Plan for fiscal year
2012 is $242 million. GAO was requested to assess the extent to which
CBP (1) has the information needed to support and implement the Plan and
(2) estimated life-cycle costs for future investments in accordance
with best practices. GAO analyzed Plan documents and cost estimates,
compared those estimates with best practices, and interviewed CBP
officials." - GAO, Nov. 4, 2011.