About NiSource, National Grid and DTE Energy:NiSource Inc. (NYSE: NI), based in Merrillville, Ind., is a Fortune 500 company engaged in natural gas transmission, storage and distribution, as well as electric generation, transmission and distribution. NiSource operating companies deliver energy to 3.8 million customers located within the high-demand energy corridor stretching from the Gulf Coast through the Midwest to New England. Information about NiSource and its subsidiaries is available via the Internet at www.nisource.com. National Grid (NYSE: NGG) is an international energy delivery company. In the US, National Grid delivers electricity to approximately 3.3 million customers in Massachusetts, New Hampshire, New York and Rhode Island, and manages the electricity network on Long Island under an agreement with the Long Island Power Authority (LIPA). It is the largest distributor of natural gas in the northeastern U.S., serving approximately 3.4 million customers in Massachusetts, New Hampshire, New York and Rhode Island. National Grid owns over 4,000 megawatts of contracted electricity generation that provides power to over one million LIPA customers. Information about National Grid is available at www.nationalgrid.com. DTE Energy (NYSE: DTE) is a Detroit-based diversified energy company involved in the development and management of energy-related businesses and services nationwide. Its operating units are Detroit Edison, an electric utility serving 2.2 million customers in Southeastern Michigan, and MichCon, a natural gas utility serving 1.3 million customers in Michigan and other non-utility, energy businesses focused on gas pipelines and storage, coal transportation, unconventional gas production and power and industrial projects. Information about DTE Energy is available at www.dteenergy.com. Forward-Looking Statements: This news release contains forward-looking statements within the meaning of federal securities laws. These forward-looking statements are subject to various risks and uncertainties. The factors that could cause actual results to differ materially from the projections, forecasts, estimates and expectations discussed herein include, among others things, risks associated with contract termination rights, increased competition in deregulated energy markets, weather, fluctuations in supply and demand for energy commodities, growth opportunities, dealings with third parties over whom Millennium has no control, actual operating experience, the regulatory process, regulatory and legislative changes, changes in general economic, capital and commodity market conditions, and counter-party credit risk, many of which are beyond the control of Millennium. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this news release. Millennium does not undertake any obligation to publicly release any revision to these forward-looking statements to reflect events or circumstances after the date of this news release.