We're getting an extremely rare look at President Franklin D. Roosevelt walking. The Pennsylvania State Archives released an eight-second video of him yesterday. It’s from the summer of 1937 and shows President Roosevelt walking with an assistant as he arrived to watch an all-star baseball game in Philadelphia. It’s one of only two known clips of the president walking. FDR was diagnosed with polio in 1921 and tried his best to hide his disability from the public.