Boeing executives said Wednesday they remain sure of the KC-46 tanker program's long-term value -- despite a $536 million pre-tax charge the company announced last week. "We do have a lot more work to do," Dennis Muilenburg, Boeing's chief executive, told analysts during a call Wednesday. "But we are on the right path." He said Boeing remains "confident" of the long-term financial value of the tanker program, which is being developed on a fixed-price contract. The company has said it...