Welcome to the Hacker Space at Boston University

In this excerpt from "WikiSecrets," coming May 24, FRONTLINE uncovers video of Pfc. Bradley Manning around the time he allegedly handed over half-a-million classified documents to the WikiLeaks website. With exclusive access to those closest to Manning--including his father, close friends and his Army bunkmate--FRONTLINE explores how and why the secret cache of documents may have been leaked.