Secure Borders, Safe Travel, Legal Trade: U.S. Customs and Border Protection Fiscal Year 2009-2014 Strategic Plan [open pdf - 1MB]
"A number of factors have significantly influenced the content of this strategic plan. CBP [Customs and Border Protection] is the Nation's frontline border agency with the dual mission of securing the Nation's borders while facilitating legitimate trade and travel. This requires protecting the Nation against cross-border violations that threaten national security, the economy, and public safety. CBP must remain vigilant in addressing these challenges and threats. CBP faces the challenge of countering criminal and terrorist exploitation of international passenger and commercial cargo transportation systems at 327 official air, land, and sea ports of entry (POEs). CBP must also prevent the illegal flow of people and contraband across approximately 7,000 miles of land border and, in partnership with the U.S. Coast Guard, approximately 95,000 miles of shoreline."
CBP Publication Number 0401-0809; Customs and Border Protection Publication Number 0401-0809
U.S. Customs and Border Protection: http://www.cbp.gov/