February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

This report covers ways in which the 112th Congress can introduce relevant legislation to safeguard pipelines that transport natural gas, oil, and other hazardous liquids across the United States. While an efficient and fundamentally safe means of transport, many pipelines carry materials with the potential to cause public injury and environmental damage; the networks are also widespread and vulnerable to accidents and terrorist attack.