SEOUL, South Korea (AFP) — South Korean megastars BTS performed their first show in nearly four years on Saturday in front of enormous crowds in Seoul for a K-pop extravaganza livestreamed to millions more worldwide. Widely lauded as the biggest boy band in the world, BTS went on hiatus in 2022 so the seven members could serve compulsory military service, some near the heavily fortified border with North Korea. The...