38 North, a website operated by the U.S.-Korea Institute at Johns Hopkins University, had warned of an impending rocket launch based on analysis of commercial satellite images before even the U.S. and South Korean intelligence agencies found out about it.
The size of the camp increased 72 percent from 580 sq. m to 1,000 sq. m over recent years, according to the group, suggesting that the camp, which earlier had an estimated 5,000 inmates, now houses a lot more people. The number of guard posts also doubled compared to 2003.