The 20,000 tickets for the Seoul concerts were sold out within 40 minutes of going on sale on 13 February , which amounted up to a gross of . During the Seoul concerts , the group was unable to use special effects because of the 2012 Nuclear Security Summit , held at the COEX Convention & Exhibition Center in neighbouring Samseong-dong , Gangnam-gu , which has banned the use of explosives including fireworks
2012 Nuclear Security Summit
2012 Nuclear Security Summit
Grand Tour: The Return