In '60 Minutes' interview, whistleblower insists he's done nothing wrong as US launches criminal investigation into document leaks.
Ban Ki-moon: World must find way to respect privacy of senior officials; alleged US document leaker's lawyer claims mistreatment of client.
2012 Republican presidential hopeful says US gov't employee responsible for leak is guilty of treason, has blood on hands.
Report: Serial Wikileaker also released graphic shooting video.
Bradley Manning called himself a "humanist" and a "hactivist."