BTS has secured the No. 1 spot on the Billboard 200 for a third consecutive week with “Arirang,” becoming the first group to do so in more than a decade. According to chart preview data published by Billboard on Monday, the group’s fifth album has topped the April 18 chart, extending its run at the summit to three weeks. Billboard releases preview data earlier in the week, with official charts dated to the following Saturday. It is the first time in more than a decade that a group has spent thre