(Photo credit: Paul Childs-Reuters via Imagn Images) South Korea captain and star forward Son Heung-min posted a lengthy apology to fans on Instagram Monday after his nation was eliminated in the group stage of the World Cup. South Korea left the World Cup a disappointing 1-2-0 in Group A after losing an all-important final game 1-0 to South Africa. That let South Africa clinch second place in the group, wh