The sixth biggest U.S. coal company Massey Energy says it has signed a deal to work with India-based Jindal Steel & Power on potential underground coal projects in India, Mongolia, Australia and the United States. Massey Chief Executive Don Blankenship says the agreement promises to extend his company”s operations overseas. For Delhi-based Jindal, the pact promises lower cost and stable energy sources. Jindal operates steel, power, mining and oil & gas businesses among other things.