Growth in U.S. natural gas production has driven the development of new pipelines from producing regions to consuming markets. Over 300,000 miles of transmission pipeline already transport natural gas across the country. Gathering lines carry natural gas, crude oil, and other hazardous liquids from production wells to processing facilities, refineries, or transmission pipelines. However, if domestic natural gas trends continue, the need for new pipelines could still be substantial. This book provides an overview of the federal certification process for interstate pipelines, recent policy issues, cybersecurity risks and security concerns.