Gwanghwamun Square in central Seoul transformed into a massive open-air concert venue on Saturday, as an estimated 260,000 people gathered from around the world to watch BTS’ first group performance in three years and nine months. The turnout marked the largest crowd in the area since the street celebrations in the Gwanghwamun area during the 2002 FIFA World Cup Korea Japan, which drew 200,000-250,000 people. As early as noon, BTS fans — known as Army — began arriving to bask in the atmosphere a