The Missile Defense Agency is awarding Lockheed Martin Space Systems Co., Sunnyvale, Calif., a fixed-price incentive and cost-plus-fixed-fee modification with a total value of $694,964,438 under Missile Defense Agency contract. The modification will include the definitization of an undefinitized contract action with a not-to-exceed value of $298,000,000. Under this modification Lockheed Martin will manufacture and deliver 48 interceptors and ground support equipment required to support batteries three and four for the Terminal High Altitude Area Defense Program. The work will be managed in Sunnyvale, Calif., with final assembly performed in Troy, Ala. The performance period is through December 2013. Fiscal 2010 procurement funds in the amount of $144,847,937 and fiscal 2011 procurement funds of $430,916,501 will be used to fund this modification. Fiscal 2010 procurement funds in the amount of $119,200,000 were previously funded on the UCA. The Missile Defense Agency is the contracting activity.