What happened in the Delta Flight 4819 crash in Toronto and what is being investigated?

Delta Flight 4819 crashed in Toronto when the passenger jet flipped over on an icy runway, resulting in 21 injuries. Despite the severity of the accident, all passengers survived and were accounted for following a frantic evacuation, which is being described as miraculous. Investigators are now focusing on the plane's black boxes to determine the cause of the crash. The incident has sparked growing concerns about aviation safety, with officials examining the circumstances behind this latest flight scare while also acknowledging the critical role that flight attendants played in successfully evacuating all passengers.