SEOUL – Once again, the Korean peninsula is experiencing one of its periodic bouts of extremism, this time marked by the suicide on May 22 of former president, Roh Moo-hyun, and North Korea’s second test of a nuclear device. Roh’s suicide is a disaster for his family and a national shame, while North Korean leader Kim Jong-il’s nuclear blast is something of a temper tantrum, but one which may have dire consequences for the two Koreas and the world.