Energy Transfer Partners (NYSE:ETP) is a midstream master limited partnership led by CEO Kelcy Warren. The partnership controls about 69,000 miles of pipeline across the country, though the majority of its assets are concentrated in Texas. It was once strictly a natural gas midstream company, but after its acquisition of Sunoco closed this year, ETP opened itself up to the world of crude oil, natural gas liquids, and refined products. In this video, energy analyst Aimee Duffy takes a closer look at what makes ETP tick, and what investors should expect from it in the future.