Mollie O’Callaghan has won the 200 metres freestyle in Paris -- in Olympic record time -- edging her rival and compatriot Ariarne Titmus who finished second in a sensational race. Mollie O’Callaghan’s path to gold started in the Greenbank Gators swimming club, south of Brisbane. The club has already produced three Olympians. Natalie Willcocks, from the club, says it's a special moment for the younger generation.