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With the national institutes of health, 40% of american adults of sleep deprived. and the consequences that result from too little sleep can be catastrophic as the natgeo doc points out. experts believe sleep deprivation may have played a role in the exxon valdez oil spill, the staten island ferry crash and the nuclear meltdown and the derailing of a chicago train. according to the national traffic safety board, the conductor admitted to falling asleep. >> it's far from ideal for someone to be operating heavy machinery or driving a car or bus when they are sleep deprived. >> reporter: it's dri...

With the national institutes of health, 40% of american adults of sleep deprived. and the consequences that result from too little sleep can be catastrophic as the natgeo doc points out. experts believe sleep deprivation may have played a role in the exxon valdez oil spill, the staten island ferry crash and the nuclear meltdown and the derailing of a chicago train. according to the national traffic safety board, the conductor admitted to falling asleep. >> it's far from ideal for someone to be operating heavy machinery or driving a car or bus when they are sleep deprived. >> reporter: it's dri...