Suga, 'in simple attire'

group BTS left for United States of America New York via the Incheon International Airport on the afternoon of the 18th.

BTS will attend the 76th United Nations General Assembly as President Moon Jae-in's special envoy.

About BTS

BTS, also known as the Bangtan Boys, is a South Korean boy band that was formed in 2010 and debuted in 2013 under Big Hit Entertainment.  Wikipedia