Energy Transfer Partners LP is engaged in natural gas operations. The Company's natural gas operations include natural gas midstream and intrastate transportation and storage through La Grange Acquisition, L.P., which it refers to as ETC OLP; and interstate natural gas transportation and storage through ET Interstate and Panhandle. Its liquids operations, including NGL transportation, storage and fractionation services through Lone Star. Its product & crude oil operations, include, product & crude oil transportation, terminalling services & acquisition and marketing activities through Sunoco Logistics; and retail marketing of gasoline & middle distillates through Sunoco, Inc. Its segments are Intrastate Transportation & Storage, Interstate Transportation & Storage, Midstream., Liquids Transportation & Services, Investment in Sunoco Logistics, Retail Marketing and all other segment. Under the intrastate transportation & storage segment, the natural gas transportation pipelines receive natural gas from other mainline transportation pipelines, storage facilities and gathering systems and deliver the natural gas to industrial end-users, storage facilities, utilities & other pipelines. Through intrastate transportation & storage segment, it owns & operates approximately 7,500 miles of natural gas transportation pipelines with approximately 14.1 Bcf/d of transportation capacity and three natural gas storage facilities located in the state of Texas. Under the interstate transportation & storage segment, the natural gas transportation pipelines receive natural gas from other mainline transportation pipelines, storage facilities and gathering systems and deliver the natural gas to industrial end-users, storage facilities, utilities & other pipelines. Through interstate transportation & storage segment, it directly owns & operates approximately 12,300 miles of interstate natural gas pipelines with approximately 11.2 Bcf per day of transportation capacity & have a 50% interest in the joint venture that owns the 185-mile Fayetteville Express pipeline and the 500 mile Midcontinent Express pipeline. The midstream natural gas industry is the link between the exploration and production of natural gas and the delivery of its components to end-use markets. The midstream industry consists of natural gas gathering, compression, treating, processing, storage, & transportation, and is characterized by regional competition based on the proximity of gathering systems and processing plants to natural gas producing wells and the proximity of storage facilities to production areas and end-use markets. Under the liquid transportation & services segment, the liquids transportation pipelines transport mixed NGLs & other hydrocarbons from natural gas processing facilities to fractionation plants & storage facilities. NGL storage facilities are used for the storage of mixed NGLs, NGL products & petrochemical products owned by third-parties in storage tanks & underground wells, which allow for the injection & withdrawal of such products at various times of the year to meet demand cycles. NGL fractionators separate mixed NGL streams into purity products, such as ethane, propane, normal butane, isobutane & natural gasoline. The Partnership's interests in Sunoco Logistics consist of 67.1 million Sunoco Logistics common units and 9.4 million Sunoco Logistics Class B Units, collectively representing 27.5% of the limited partner interests in Sunoco Logistics. Sunoco Logistics' crude oil operations provides transportation, terminalling & acquisition and marketing services to crude oil markets throughout the southwest, midwest & northeastern United States. The retail marketing business is conducted through wholly-owned subsidiary, Sunoco, Inc. The retail marketing operations include the sales of motor fuel and merchandise at Company-operated retail locations & branded convenience stores conducted in 14 states, on the east coast & south regions of the United States.