Truth on Trial: 'Manning did amazing service to people'. (VIDEO)

U.S. army whistleblower Bradley Manning could get 20 years in prison for what he describes as an attempt to reveal 'the bloodlust' and disregard for human life in the American military.

Manning pleaded guilty to 10 lesser charges out of 22 he's facing for the biggest leak of state secrets in U.S. history.

Former MI5 agent Annie Machon says Manning has done the people a great service, at least to those who struggled to reveal the truth behind U.S. helicopter attacks in Iraq.