Citing the United States' postponement of delivery of food aid, North Korea says that it is no longer obligated to hold off on nuclear development.
After walking out of a meeting meant as a preliminary step toward six-party nuclear talks, some worry North Korea may stage another nuclear test. Its first test came during a break in six-party talks in 2006.
North Korea's Kim Jong-il gave son Kim Jong-un a military as well as a political role. The emphasis on military appointments in the politburo fortifies the 'military-first policy.'