The Defiance YMCA will be hosting a worldwide event next week – the world’s largest swim lesson (WLSL).The event will take place on June 20 across six continents worldwide, and this is the 15th year for the event, but the first time the Defiance YMCA will be taking part. Defiance will be one of 15 places in Ohio hosting the event. Those wishing to participate can register by calling the YMCA at 419-784-4747 or visiting its website at DefianceYmca.org through June 19. The number of registrations is unlimited.