**GAO-08-757**                      Published: May 16, 2008. Publicly Released: Jun 12, 2008.                  

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## Highlights

From January 2003 to September 2007, GAO testified before the Committee on three occasions to describe security vulnerabilities that terrorists could exploit to enter the country. GAO's first two testimonies focused on covert testing at ports of entry--the air, sea, and land locations where international travelers can legally enter the United States. In its third testimony, GAO focused on limited security assessments of unmanned and unmonitored border areas between land ports of entry. GAO was asked to summarize the results of covert testing and assessment work for these three testimonies. This report discusses the results of testing at land, sea, and air ports of entry; however, the majority of GAO's work was focused on land ports of entry. The unmanned and unmonitored border areas GAO assessed were defined as locations where the government does not maintain a manned presence 24 hours per day or where there was no apparent monitoring equipment in place. GAO assessed a nonrepresentative selection of these locations and did not attempt to evaluate all potential U.S. border security vulnerabilities. Further, GAO's work was limited in scope and cannot be projected to represent systemic weaknesses. In response to this report, DHS provided a written update on numerous border protection efforts it has taken to enhance border security since 2003. GAO did not attempt to verify the information provided by DHS, but has included the response in this report.

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## Topics

Homeland Security

Border controlBorder patrolsBorder securityContrabandHomeland securityIdentification cardsInvestigations by federal agenciesLaw enforcementPort securityProgram evaluationRisk assessmentRisk managementSecurity assessmentsSecurity investigationsSecurity regulationsSecurity threatsStrategic planningTerrorismProgram goals or objectives