A major project focusing on the Boeing 737 and 787, the flagship passenger jet of the Boeing Company. Our journalism reveals the deeply-held safety concerns of current and former Boeing engineers, who in some cases fear to fly on the 737 and 787, the plane they build. We uncover allegations of on-the-job drug use, quality control problems and poor workmanship. We explore the roots of the battery problems that led to the plane's grounding due to safety concerns