Shedding new light on one of the most influential leaders in American history, Yale University historians released a report Thursday that suggests White House officials deliberately hid President Franklin Roosevelts mechanical spider legs from the public. The report, which draws upon a recently discovered trove of photographs, state documents, and personal journals, describes a coordinated effort by top aides to conceal the fact that the 32nd president relied on a set of eight hydraulically powered cast-iron legs to skitter about during the last two decades of his life. Roosevelts advisers feared voters of the time would never elect a man whose lower extremities had been replaced with an intricate system of spider-like appendages, said report co-author Stephen Elmore, who noted that during FDRs first campaign for governor of New York, his staff began to disguise the 4-foot-long triple-jointed prostheses that he had custom-designed to regain mobility after becoming paralyzed in 1921. After he secured the White House, they continued to worry about the potentially devastating fallout should his eight lanky, motorized legs be discovered by political opponents or foreign governments. Records show that even some members of his Cabinet were unaware Roosevelt was a robotic arachnid below the waist, Elmore added. According to historians, the presidents entourage blocked views of his wide base of spindly metal legs by closely flanking him on all sides until he was safely behind a desk, a table, or one of his specially crafted 6-foot-wide podiums. If he needed to be seen seated, they reportedly covered his legs with blankets or pillows, as was the case at the 1945 Yalta Conference, when assistants draped 11 wool shawls over his lap before he posed with Winston Churchill and Joseph Stalin. The president is said to have cherished getaways to his personal estate in Hyde Park, where he was free to scutter around the grounds without fear of being spotted. Various written accounts reveal that when driving him to public events, Roosevelts chauffeurs always parked his Lincoln convertible in hidden garages so no one could glimpse him exiting the vehicle, a noisy process that required him to extend his long, clanking alloyed limbs out the limousines door one at a time until he could crawl out onto the pavement. While most reporters kept the presidents condition off the record, Secret Service documents show that agents often confiscated the film of noncompliant photographers. Historians discovered one set of images in which Roosevelt, his hands occupied with the adjustment of his bow tie, can be seen standing on his two hindmost legs and using each of his remaining legs to sign six different executive orders simultaneously. There are several clues that, in retrospect, support the idea that FDR made use of a mechanical contraption consisting of four pairs of symmetrical limbs that emerged from beneath his torso, said Elmore, noting that the occasional faint hissing of the presidents leg pistons is audible in several of his fireside chats. In the recording of 1943s On The Coal Crisis one can even hear, beneath his familiar patrician tones, what is most likely the sound of Roosevelt lubricating a squeaky ball bearing in his knee joint as he argues that it is the United Mine Workers patriotic duty to end their strike. We also believe the mysterious rhythmic banging heard during his Infamy speech is the sound of at least three of his heavy iron feet tapping nervously on the floor, he added. Unearthed blueprints indicate many renovations were made to the White House during FDRs administration, including widened doorways and a titanium-reinforced bed frame to support the extra 400 pounds of his specialized extremities. In addition, financial records confirm Roosevelt retained a full-time staff of machinists and metalworkers to handle repairs and keep him moving around during his more than 12 years in office. Because the concealment of his condition took an enormous emotional toll, the president is said to have cherished getaways to his personal estate in Hyde Park, where he was free to scutter around the grounds without fear of being spotted. It was there, records suggest, that he sought refuge during the most trying days of the Great Depression, clambering up the wall to a ceiling corner of his study to devise his outlines for projects such as the Civilian Conservation Corps and Tennessee Valley Authority. Its important to remember that in those days, the need to rely on eight mechanical spider legs was perceived as a weakness, said Elmore, citing a lack of education about the issue and the fact that most Americans simply chose not to talk about it. For him, it was a matter of political survival. Of course, in todays media environment, it would be nearly impossible for a president to disguise a set of large molded metal appendages. Fortunately, our views are more progressive now, he continued. For example, in the current presidential race, no one considers Sen. Ted Cruzs razor-sharp tungsten fire-ant mandibles to be a disadvantage. 