Air Force cautiously confident on new fighter.

• Position: Washington PULSE

Only months before the Air Force is scheduled to fly the new F-35 Joint Strike Fighter, the service's top officer gave a less-than-glowing assessment of the program. Of most concern are the aircraft's intricate software systems, says Gen. T. Michael Moseley, Air Force chief of staff. "The primary challenge is software integration. Not the hardware side," he told reporters. But he said he remains confident that the contractor, Lockheed Martin, will...