Open this photo in gallery:Canadian shot putter and discus thrower Jackie MacDonald sits on the grass in front of the Olympic village and training grounds in Heidelberg West, Melbourne in November, 1956.James Cooke/SuppliedSave for laterA year after Jackie MacDonald first picked up the heavy ball used in shot put, she won a silver medal at the British Empire and Commonwealth Games.The 21-year-old Grade 5 teacher from Toronto was a sensation at Empire Stadium in Vancouver, an unknown who suddenly stood among the world’s best at propelling a four-kilogram metal ball.Ms. MacDonald, who has died at 93, won five national championships...