Investigators are trying to determine what caused the fatal roller coaster accident at Six Flags Over Texas Friday. Safety inspector Walter Reiss weighs in on what he believes may have been a factor ... more 
Investigators are trying to determine what caused the fatal roller coaster accident at Six Flags Over Texas Friday. Safety inspector Walter Reiss weighs in on what he believes may have been a factor and also insists the industry 'is very safe.' (July 22) less 
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Mon, Jul 22, 2013 6:33 PM EDT