Briefing: K-pop BTS makes comeback in Seoul: 260,000 fans, millions watching on screensBriefing: K-pop BTS makes comeback in Seoul: 260,000 fans, millions watching on screensBriefing: K-pop BTS makes comeback in Seoul: 260,000 fans, millions watching on screens

Strategic angle: Numerous roads closed, hundreds of thousands of fans on site and millions watching on Netflix: the K-pop band’s comeback is a mega event.