A FedEx truck crossed a median and slammed head-on into a bus carrying students in Northern California, killing 10 people, authorities said Friday. The collision Thursday evening killed both drivers, five students and three chaperones, said Lt. Bruce Carpenter with the California Highway Patrol. The crash resulted in a fire that engulfed the truck and bus in flames, spewing black smoke into the sky. “I went outside, and everything was in flames already,” a local resident, Luis Lopez, told CNN affiliate KXTB. “There were a couple of explosions after that.” The reason the FedEx truck crossed the median remains under investigation, the Highway Patrol said. The investigation could take months. More