People in a crowd flee as an out-of-control monster truck plows through spectators at a Mexican air show in the city of Chihuahua Saturday. Officials say they are investigating the incident, in which eight people died. AP hide caption

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A woman uses a cellphone while driving in Los Angeles in 2011. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

The wreckage of a hot air balloon and its gondola lay in a field near Luxor, Egypt, on Tuesday. A fire and subsequent crash killed many of those who were aboard the tourist flight. Reuters /Landov hide caption

itoggle caption Reuters /Landov