After contracting polio, six-year-old Mary Grimley became the nation's first "poster child," photographed with President Roosevelt at his Warm Springs rehabilitation center. But a close look at photos reveals something other than the "cheerful invalid" that the abled expect: mouth closed in a frown, eyes defiant and proud, this bold child is less than impressed with the label of "poor crippled girl." Mary Mason's life story records her triumph...