As well as the obvious classes like bomb-making, Kim Dong-Sik's intensive spy training in North Korea included memorising hundreds of South Korean pop songs and dance moves.
Former North Korean spy Kim Dong-Sik looks out through a window before an interview with AFP in Seoul on August 19, 2013. Kim was captured in the South in 1995 and spent years undergoing interrogation before renouncing communism and joining the South's intelligence authorities as an analyst.
Such strategies for assimilating into South Korean society were considered essential to avoid suspicion, Kim revealed in a recently-published memoir that lifts the lid on some of the workings of the North's spy agency.
This article is older than 60 days, which we reserve for our premium members only.You can subscribe to our premium member subscription, here.