through the symbolism of a massive public spectacle. cnn's alena cho was invited in to north korea to witness it. >> reporter: we are in the center of kim il-sung square, named for the founder of north korea. what you are witnessing behind subcommittee what's being billed as the largest military parade in that country's history. it is officially the 65th anniversary of the founding of the ruling workers party of north korea. it is also a national holiday. but you in effect what this really is is an elaborate coming out party for the man, the heir apparent, the man who will become the next leader of north korea. kim jong-un. he is the young son of the ailing leader, kim jong-il a little about what is happening today. security is incredibly tight. there were numerous checkpoints, even our government minders were checked. to give you an idea, don, my notebook and pen were checked.