If visitors are attracted to a site, some people see economic opportunity. Graham Dann, a researcher on the tourism industry, implies that profiting from dark tourism sites may not be immoral but it seems inappropriate because merchants selling food, drinks, and souvenirs may detract from the serious nature of battlefields and disaster sites. Meanwhile, others have created tours based on sensational, or attention-grabbing, news stories. Visitors to Paris, for instance, can pay to ride along the same route in the same model Mercedes as Princess Diana before her deadly car accident.