The Pentagon estimates the price tag for the Next Generation Interceptor program is $17.7 billion, including $13.1 billion to develop, $2.3 billion to field, and $2.2 billion to operate and sustain 21 guided missiles, according to new details provided by the Defense Department. These figures were tallied by the Pentagon's office of cost assessment and program evaluation in an independent cost estimate prepared to inform a technology development acquisition decision for NGI, which last month produced contracts to Lockheed Martin...