It was 50 years ago, a Wednesday in late October and Eddie Maple was spending his day riding at Aqueduct. It was supposed to be just another routine day at the track. But then the seventh race happened. The stewards disqualified Ron Turcotte's mount and handed him a five-day suspension for careless riding. In those days, there were no appeals, no dragging things through court. The suspension started immediately, which meant that Secretariat would need a rider for what would be his final career race, the 1973 GII Canadian International...