This follows threats from Pyongyang last week both to end the armistice and to 'exercise the right to a preemptive nuclear attack.'
The public backing for North Korea's 'supreme leader' Kim Jong-un at his father's memorial provides a strong signal that officials have unified around him in the wake of Kim Jong-il's death.
As North Korea mourns during Kim Jong-il's funeral, South Koreans are reminded of the dangers of their unstable and poor sibling nation.
North Korea has taken control of Mt. Kumgang, a jointly maintained tourist area in which South Korea's Hyundai Asan had invested more than $1.5 billion for a hotel, hot springs, shopping mall, and a road inside the North.
South Korea, one of the biggest investors in construction projects in the Middle East for more than 40 years and a major importer of oil, may have more to fear than most as it evacuates Koreans in Libya.