Activist Ro Su Hui, center, is detained by South Korean officials as North Korean officials, foreground, look on, immediately after No crossed the demarcation line between North and South Korea at the Demilitarized Zone at Panmunjom, Korea, on Thursday, July 5, 2012. South Korean police arrested the activist for making an extended trip to Pyongyang without South Korean government approval as required by law. [Photo/CNR]