Trans-Alaska Pipeline: Ensuring the Pipeline's Security, Briefing Report to the Chairman, Subcommittee on Water, Power, and Offshore Energy Resources, Committee on Interior and Insular Affairs, House of Representatives [open pdf - 1MB]
The Trans-Alaska Pipeline System is responsible for transporting nearly a quarter of the nation's domestically produced crude oil. This report reviews the security of the pipeline. It discusses (1) what federal and state agencies have done to assess the vulnerability of the pipeline to terrorists and (2) what these agencies and the Alyeska Pipeline Service Company have done to protect the pipeline.
General Accounting Office: http://www.gao.gov