An Arizona Highway Patrol officer walks across the scene of an accident in which a tour bus careened off the highway and crashed off northbound Highway 93, Friday, Oct. 19, 2012, near W

 

              An Arizona Highway Patrol officer walks across the scene of an accident in which a tour bus careened off the highway and crashed off northbound Highway 93, Friday, Oct. 19, 2012, near W
An Arizona Highway Patrol officer walks across the scene of an accident in which a tour bus careened off the highway and crashed off northbound Highway 93, Friday, Oct. 19, 2012, near Willow Beach, Ariz. The crash killed the driver and left at least four passengers with serious injuries. About 45 other passengers were less seriously hurt and not all of them required hospital treatment, the Arizona Highway Patrol said. (AP Photo/Julie Jacobson)