Could North Korea actually put a nuclear warhead atop a rocket and fire it at a potential adversary?Some still doubt North Korea can make a warhead small enough, or miniaturize it enough, to mount atop a missile. But that's what North Korea said it proved Friday. South Korean monitors said Friday's nuclear test had a yield equivalent to 10 kilotons of TNT, which would make it North Korea's most powerful of five tests to date. That blast came just days after North Korea test-fired three ballistic missiles, which landed in Japan's Air Defense Identification Zone, about 155 miles (250 kilometers) from a Japanese island. Last month, a missile fired from a submarine also landed in the same zone. Read more
