The bus apparently ripped through a guardrail on a highway, though authorities have said the cause is still under investigation. Photos taken shortly after the crash showed the vehicle engulfed in flames as plumes of thick, black smoke rose. Daylight revealed a burned-out shell with all of its windows blown out, sitting in the median. A portion of the guardrail was peeled away and lying in the road. In 2019, Bulgaria had the second-highest road fatality rate in the 27-nation European Union, with 89 people killed per million, according to European Commission data. “Let’s hope we learn lessons from this...