Secretive North Korea put its leader-in-waiting on display Sunday at a massive military parade in Pyongyang, showcasing the youngest son of current ruler Kim Jong-Il in a rare live television broadcast. Kim Jong-Un, thought to be aged about 27, stood near his father at the parade, applauding and saluting as thousands of goose-stepping troops marched past along with tanks and trucks carrying missiles and other weaponry. The parade, one of the largest for years in the hardline communist state, gave many North Koreans their first extensive look at the young heir apparent. Some foreign broadcasters were also invited. South Korea's Yonhap news agency, which monitors Pyongyang's media, said it was the first ever live broadcast of a military parade in the North.