Clapping, waving and even cracking a smile, the youngest son of North Korean leader Kim Jong Il joined his father Sunday at a massive military parade in his most public appearance since being unveiled as the nation's next leader.

Kim Jong Un, dressed in a dark blue civilian suit, sat next to his father on an observation platform at Kim Il Sung Plaza as armored trucks with rocket launchers and tanks rolled by as part of celebrations marking the 65th anniversary of the reclusive state's ruling Workers' Party.

Just days earlier, the world got a first glimpse of the son from photos published in a state newspaper. Sunday's appearance was carried live by state TV, beaming him into North Korean households and giving the people their first good look at the future leader....