What is the current status of the investigation into the Delta flight crash in Toronto?

Investigators have recovered the black boxes from the Delta flight that crash-landed upside down in Toronto, and these have been sent to a lab for analysis. Their contents will be crucial in determining what caused the incident. Communications between pilots and air traffic control were functioning normally with no loss of communication reported. Investigators will examine various factors, including weather conditions and aircraft systems, to understand what went wrong during the landing that injured 21 of the 80 passengers onboard.