Sikorsky Aircraft Corp., Stratford, Conn., is being awarded a $19,453,196 modification to a previously awarded indefinite-delivery/indefinite-quantity contract (N00019-07-D-0004) to exercise an option for security, project engineering, integrated logistics support, VH training, and technical manual updates in support of the VH-60N and VH-3D presidential helicopter fleet. Work will be performed in Stratford, Conn. (88 percent), and Quantico, Va. (12 percent), and is expected to be completed in September 2012. Funds will not be obligated at time of award. Contract funds will not expire at the end of the current fiscal year. The Naval Air Systems Command, Patuxent River, Md., is the contracting activity.