In what Democratic Sen. Richard Blumenthal called a “moment of reckoning,” Boeing CEO David Calhoun was grilled by lawmakers Tuesday over issues including safety failures and retaliation against whistleblowers. The BBC reports that relatives of Boeing 737 Max crash victims, some of them holding photos of their loved ones, yelled at Calhoun during the hearing. An apology. CNN reports that before his opening remarks, Calhoun turned to face the families. “I would like to apologize on behalf of all of our Boeing associates spread throughout the world—past and present—for their losses,” he said. On…