Brakes become key issue in deadly Calif. bus crash - Article Photos 12/13

A National Transportation Safety Board official climbs into the bus after a news conference Tuesday, Feb. 5, 2013, at Certified Towing in Ontario, Calif. The NTSB gave an update on the investigation of Sunday's tour bus crash near Yucaipa that killed seven people. (AP Photo/The Inland Valley Daily Bulletin, Jennifer Cappuccio Maher)