Halliburton Company is an American multinational corporation. One of the world's largest oil field service companies, it has operations in more than 70 countries. It owns hundreds of subsidiaries, affiliates, branches, brands, and divisions worldwide and employs approximately 55,000 people. The company has dual headquarters located in Houston and in Dubai, but it remains incorporated in the United States. Halliburton's major business segment is the Energy Services Group. It offers a broad array of products and services to upstream oil and gas customers worldwide through fourteen product service lines: Artificial Lift, Cementing, Completion Tools, Multi-Chem, Pipeline & Process Services, Production Enhancement, Production Solutions, Baroid, Drill Bits & Services, Landmark Software & Services, Sperry Drilling, Testing & Subsea, Wireline & Perforating, and Consulting & Project Management. Halliburton's former subsidiary, KBR, is a major construction company of refineries, oil fields, pipelines, and chemical plants. Halliburton announced on April 5, 2007, that it had sold the division and severed its corporate relationship with KBR, which had been its contracting, engineering and construction unit as a part of the company. The company has been involved in numerous controversies, including its involvement with Dick Cheney – as U.S. Secretary of Defense, then CEO of the company, then Vice President of the United States – and the Iraq War, and the Deepwater Horizon, for which it agreed to settle outstanding legal claims against it by paying litigants $1.1 billion.