ORLAND, Calif. – A FedEx tractor-trailer crossed over a grassy median on a Northern California freeway and slammed into a bus carrying more than 40 high school students in an explosive crash that left 10 people dead, authorities said.

Among the students on the trip to visit Humboldt State University was Steven Clavijo, 18, a senior at West Ranch High in Santa Clarita, who planned to enroll in the school. Just as Clavijo was trying to catch a nap Thursday afternoon, he said he felt the big vehicle begin to shake from left to right and then he heard a loud boom.

Read the complete story at the Associated Press.