South Koreans watched smoke coming from one of their most historic monuments. Fire broke out after a guard had left for the night. Fire fighters arrived at the gate within minutes and the wall went down in a blaze after a few hours. Police say they arrested a suspect. The suspect said he set the wall on fire because he was upset about a land dispute. The suspect had been convicted two years ago on similar charges. The suspect spoke briefly today as he arrived at the police station. The police said the man used a ladder to slip into the gate and set the structure on fire with a lighter. South Koreans have been stunned at how easy it was to do so much damage. It will take $20 million dollars to restore the gate.