Article Photos: Brakes become key issue in deadly Calif. bus crash 9/13

Investigators stand at the scene after a tour bus was lifted back onto the road Monday, Feb. 4, 2013, after it collided with two other vehicles and crashed Sunday, killing at least eight people and injuring 38, just north of Yucaipa, Calif.  The bus was carrying a tour group from Tijuana, Mexico.  (AP Photo/Reed Saxon)