Investigators work early on Monday, Feb. 4, 2013, at the scene of an accident in which at least eight people were killed and 38 people were injured Sunday after a tour bus carrying Mexican tourists careened out of control while traveling down a mountain road, struck a car, flipped and plowed into a pickup truck near Yucaipa, Calif. (AP Photo/Ringo H.W. Chiu)

Photo by: Ringo H.W. Chiu

Investigators work early on Monday, Feb. 4, 2013, at the scene of an accident in which at least eight people were killed and 38 people were injured Sunday after a tour bus carrying Mexican tourists careened out of control while traveling down a mountain road, struck a car, flipped and plowed into a pickup truck near Yucaipa, Calif. (AP Photo/Ringo H.W. Chiu)