Kinder Morgan Energy Partners, L.P. (http://www.kindermorgan.com/)

Energy Transfer Partners, L.P. (http://www.energytransfer.com/)

Natural Gas Supply Association (http://www.naturalgas.org/)

Federal Energy Regulatory Commission (FERC) (http://www.ferc.gov/)

Interstate Natural Gas Association of America (http://www.ingaa.org/)

American Gas Association (http://www.aga.org/)

Office of Pipeline Safety, U.S. Department of Transportation (DOT) (http://ops.dot.gov/)