Brakes become key issue in deadly Calif. bus crash - Article Photos 7/13

Skid marks from a tour bus are seen Monday, Feb. 4, 2013, after the bus, background, collided with two other vehicles and crashed Sunday, killing at least eight people and injuring 38, on Highway 38 just north of Yucaipa, Calif. The bus was carrying a tour group from Tijuana, Mexico. (AP Photo/Reed Saxon)