And here are two key graphs that make me think that North Korea has reached the tipping point:
"Refugees also indicate that opposition has become more open and daring. More and more pamphlets and banners are appearing calling for Kim's overthrow. Almost all refugees report seeing slogans such as "Down with Kim Jong Il" painted on walls, pylons, and railway carriages throughout the country. Statues and murals of the Kims have been defaced, and the halls erected for worship of the Kim family have been burnt down. Some officials have been found killed in their homes. Although the food crisis is easing, with the World Food Program reporting a good harvest for this year, the country remains on the brink of starvation."
(Other TAB posts on North Korea here and here.)