The National Transportation Safety Board has released its preliminary report in the April 10 Orland Crash.

It refers to the fire that consumed the FedEx semi and partially burned the tour bus as "post-crash."

That contradicts a pair of witnesses who said the big rig was on fire before the collision.

Ten people, five adults and five Southern California high school students, died in the crash on Interstate-5 near Orland.

NTSB Report: Orland Bus Crash