After a nearly four-year hiatus, the world’s biggest boy band is back with a comeback that includes a new album, world tour and Netflix documentary. But first, it begins with a free, public concert in Seoul,

On March 21, BTS made their long-awaited return to the stage after nearly four years apart, performing live at Seoul's iconic Gwanghwamun Square — with millions more watching via a live stream on Netflix across 190 countries.