North Korea says it plans to launch a rocket carrying a satellite this month . Other countries say the move is a cover for a ballistic missile test . A far more likely explanation is that -- surprise , surprise -- North Korea did not have its act together . The U.S. and South Korean militaries are conducting joint exercises in waters off the Korean Peninsula that have been closed since last year after Pyongyang conducted its fourth nuclear test. The collapse of an earlier deal hints at internal struggles in N. Korea , Hill says .
North Korea says it plans to launch a rocket carrying a satellite this month . Other countries say the move is a cover for a ballistic missile test . The U.S. and South Korean militaries are conducting joint exercises in waters off the Korean Peninsula that have been closed since last year after Pyongyang conducted its fourth nuclear test. The collapse of an earlier deal hints at internal struggles in N. Korea , Hill says .