narrator: like jeong, yong hee says she suffered at the ea hands of the north k regime. her brother was caught trying to defect and she was punished. she says she was lup and tortured by security agents. narrator: she says the officers tied her brother's hands to theagack of a truck and drd him along a dirt road as an example to others. narrator: yong hee escaped with her husband and son, leaving her brother and mother behind. (train whistle blowing) (explosion) ll sharp new warning of aut war. for the first time, the mysterious and secretive nation... there is nothing imminent, but these threatening statements have everyone on edge. are we on the brink of a nuear war? narrator: last spring, north korea became the first country since the cold war to threaten the united states mainland with a nuclear attack. when watching this i thought, wow, even from north korean standards, this is really over the top. they always do this cycle of provocation. it's just the intensity of the recent provocaon was even greater. i don't think anybody really believed the north koreans were g