Two fatal crashes of Boeing 737 Max aircraft were partly due to the plane-maker’s unwillingness to share technical details, a congressional investigation has found. The BBC reports that it blames a “culture of concealment” at Boeing, but says the regulatory system was also “fundamentally flawed”. Boeing said it had “learned many hard lessons” from the accidents. But families of the victims accused the company and the regulator of continuing to hide information. The US report is highly critical of both Boeing and the regulator, the Federal Aviation Authority. The nearly 250-page report found a series of failures in the plane’s design, combined with “regulatory capture”, an overly close relationship between Boeing and the federal regulator, which compromised the process of gaining safety certification.