2015 IRONMAN World Championship: 20 things to know for race day

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Here are 20 must-knows for Saturday’s IRONMAN World Championship in Kailua-Kona: ADVERTISING Here are 20 must-knows for Saturday’s IRONMAN World Championship in Kailua-Kona: No. 1: With more than 2,300 athletes registered to start the race on Saturday, this will be