The Missile Defense Agency is announcing the award of a sole-source, incentive-based, indefinite-delivery/indefinite-quantity contract to Lockheed Martin Corp., Information Systems & Global Solutions, Gaithersburg, Md. (HQ0147-12-D-0003), with an estimated value of $980,000,000. Under this follow-on contract, the contractor will develop, model, fabricate, integrate, test, verify, evaluate, validate, document, deliver, field, train, operate, sustain, and support updates and new capabilities to the command and control, battle management and communications element. The work will be performed in Arlington, Va. The ordering period is from Jan. 1, 2012 through Dec. 31, 2016. Fiscal 2012 research, development, test and evaluation funds will be used to incrementally fund the initial orders. This is not a Foreign Military Sales acquisition. The Missile Defense Agency, Huntsville, Ala., is the contracting activity.