National Transportation Safety Board members walk toward the bus crash site Tuesday, Feb. 5, 2013, in Ontario, Calif., before giving an update on the investigation of Sunday's tour bus

 

              National Transportation Safety Board members walk toward the bus crash site Tuesday, Feb. 5, 2013, in Ontario, Calif., before giving an update on the investigation of Sunday
National Transportation Safety Board members walk toward the bus crash site Tuesday, Feb. 5, 2013, in Ontario, Calif., before giving an update on the investigation of Sunday's tour bus crash near Yucaipa that killed seven people.(AP Photo/.Inland Valley Daily Bulletin, Jennifer Cappuccio Maher)