Preliminary findings were released over a month after severe flight turbulence injured over 20 people on a Delta flight from Salt Lake City.
The flight took off from the Salt Lake City International Airport on July 30, headed for the Netherlands, according to the National Transportation Safety Board's (NTSB) preliminary report.
When flying at 37,000 feet in altitude near Creston, Wyoming, the flight experienced severe turbulence, with the aircraft rising and falling thousands of feet over the course of a few minutes.
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