David T. Cunningham

National Propane Gas Association engages in the retail marketing of propane gas and appliances. It produces and wholesales of propane equipment. The firm offers gas cylinders, tanks, and propane transporters. The company was founded in 1931 and is headquartered Nicholasville, KY.

Liberty Propane LP distributes propane gas. The company was founded in July 2003 and is headquartered in Overland Park, KS.

Part of United States Steel Corp., United States Steel International, Inc. manufactures steel and explores for, produces, and transports crude oil and natural gas. The company is based in Pittsburgh, PA.

North Atlantic Treaty Organization (NATO) provides security consultation and defence services for its member countries. The firm is an alliance of countries from North America and Europe committed to fulfilling the goals of North Atlantic. NATO safeguards the freedom and security of its member countries by political and military means. It provides a forum in which the United States, Canada and European countries can consult on security issues of common concern and take joint action in addressing them. The organization is headquartered in Brussels, Belgium.