Summer McIntosh won three individual gold medals a year ago at the Olympics, the star in the Paris pool alongside France’s Léon Marchand. Apparently unsatisfied with three, she’ll go for five gold medals starting Sunday at the world swimming championships in Singapore. Call it a trial run for the Los Angeles Olympics in 2028. The worlds is the highest profile swim meet since last year’s Olympics, a showcase for newcomers as well veterans who hope to stick around until Los Angeles. McIntosh will be very busy during the eight days in the pool, packing her schedule with five individual events.