The price tag for canceling the C-130J aircraft program could climb above $2 billion, according to a senior Air Force official and leading defense lawmaker. In addition to penalties for terminating the Hercules aircraft program, which the Pentagon jettisoned in a December bid to trim $5 billion from its six-year spending plan, the government could also end up paying for a substantial portion of the manufacturing equipment and materials purchased by contractors to build more planes. "The aggregate of these...