RIO DE JANEIRO ( Reuters ) - Hungary 's Katinka Hosszu ended her long wait for Olympic victory .
Australia captured two gold medals in an exhilarating first day of swimming competition that saw three world records smashed in Rio on Saturday .
RIO DE JANEIRO ( Reuters ) - Hungary 's Katinka Hosszu ended her long wait for Olympic victory and Australia captured two gold medals in an exhilarating first day of swimming competition that saw three world records smashed in Rio on Saturday .