What is known about the cause of the Delta plane crash in Toronto?

Investigators are still working to determine the exact cause of the recent Delta plane crash in Toronto. During a press conference, officials revealed challenging weather conditions at the time of the incident, including strong winds and snowstorms that had affected flights prior to the crash. The CBS News correspondent Tom Hansen explicitly states in the report that 'the million dollar question remains... What was the cause of the crash? We still do not know the answer to that.' Both Canadian and U.S. investigators are collaborating on the ongoing investigation.