A free concert by K-pop group BTS at Seoul's Gwanghwamun Square scheduled for next month will run for around an hour due to safety and operational considerations, its organizer said Saturday. "The performance time has been set at an appropriate duration to ensure safe and smooth operations," Hybe said in a release. "The Gwanghwamun concert is being held in a unique setting at a public outdoor venue rather than a conventional concert hall," the company said. "Accordingly, we have set the performa