Boeing Chief Executive Dave Calhoun took responsibility for a near-catastrophic Alaska Airlines incident Tuesday, vowing “complete transparency” as the aviation giant tries to pivot from its latest crisis. “We’re going to approach this number one acknowledging our mistake,” Calhoun told employees at a safety meeting called after Friday’s emergency landing, which came after one of the plane’s panels blew out mid-flight. “We’re going to approach it with 100 percent and complete transparency every step of the way.”