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California Highway Patrol Multidisciplinary Accident Investigation Team Lt. Scott Fredrick, center right, speaks at a news conference in Willows, Calif., Friday, April 11, 2014. At least ten people were killed and dozens injured in the fiery crash between a FedEx truck and a bus carrying high school students on a visit to a Northern California College. (AP Photo/Jeff Chiu)

Bus, truck crash in California

Yahoo News

With shrieks in the background, a shocked passenger struggled to recount to an emergency dispatcher how a FedEx tractor-trailer smashed into a tour bus carrying high school students. In other 911 calls released Thursday, other witnesses described explosions after the fiery wreck that left 10 people dead.

The California Highway Patrol released the recordings as investigators returned to the scene about 100 miles north of Sacramento to reconstruct aspects of the crash.

Dozens of injured students escaped through windows before the bus exploded into towering flames just before 6 p.m. April 10.

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