KGO ABC World News With Diane Sawyer April 5, 2013
leader, raising the stakes day after day. >> reporter: imagine the cia's dossier on the world's most mysterious leader. until shortly before he took power 15 months ago, this was the only known photograph of kim jong un, a snapshot of a boy just 11 years old. >> we still debate how old he is, we think perhaps 30, but i still see quotes as 28 or 29. >> reporter: bruce clinger is the former head of the cia's korea unit. >> very little is known about someone whose finger is on a nuclear button. >> reporter: but here's what we do know, he and his older brother are believed to have studie...
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