By HYUNG-JIN KIM and KIM TONG-HYUNG, Associated Press SEOUL, South Korea (AP) — The health of North Korean leader Kim Jong Un has long been a source of morbid fascination in rival South Korea, which sits in the shadow of Kim's 1.2-million-strong army and his growing arsenal of nuclear-armed missiles. Has he gained even more weight? Is he struggling for breath after relatively short walks? What about