in high winds proved problematic, with the vehicle having a strong tendency to turn into the wind. Steering difficulty and lift at the rear of the vehicle were also observed. Fuller realized the Dymaxion "was an invention that could not be made available to the general public without considerable improvements," and instituted a program of constant refinement and improvement to the platform. Because of its limitations, Fuller and Burgess limited driving to a list of trained drivers and restricted use in high winds or inclement weather. Speed record Soon after launching Prototype One, Fuller was invited to exhibit the Dymaxion at a Bronx race track, beating the track record by 50% and drawing attention because it did not slide or drift across the track like the other race cars. Crashes A highly publicized crash in Prototype One on October 27, 1933, occurred "virtually at the entrance to the Chicago Century of Progress World's Fair." The Dymaxion rolled over during the crash, killing its driver, a Gulf employee named Francis T. Turner, and seriously injuring its passengers: aviation pioneer (and noted spy) William Sempill and Charles Dollfuss, curator of France's first air museum. The cause of the crash is disputed. A coroner's inquest did not ascribe fault for the accident, stating that it involved a collision with a car driven by a shoe salesman named Meyer Roth (Fuller erroneously identified Roth as a highly placed Chicago Parks commissioner). When Fuller learned that another car was involved, he placed the blame for the incident entirely on Roth. Eyewitnesses, however, stated that Roth's vehicle struck the Dymaxion only after it had begun to roll over. Fuller, who was not present at the accident, provided his version of events in a book he wrote in collaboration with Robert Marks on the Dymaxion; this account was repeated in Lloyd Steven Sieden's book on Fuller. They stated that the two vehicles were traveling at 70 mph, with Turner trying to evade the politician's car. The inquest showed, they argued, that the design of the Dymaxion was not a factor in the crash. The politician's car, they further claimed, was quickly and illegally removed from the scene of the crash before reporters arrived. Turner was wearing a seatbelt but was killed when the canvas-covered roof framing collapsed. Dollfuss was not wearing a seatbelt, was ejected and landed nearby on his feet. Sempill was severely injured and took