Saddam Hussein, who ruled Iraq with ruthless force and led his people into three devastating wars while pursuing his goal of dominating the Arab world, was executed by hanging . He was 69.

Whether as president of Iraq, a self-proclaimed leader of the anti-American insurgency or rambunctious courtroom defendant, Hussein cast a large shadow over world events and the nation that he controlled for most of the last 40 years.
http://www.latimes.com/news/nationwo...home-headlines

I think the speed and secrecy had alot to do with preventing potential demonstrations and violence. The Iraqi supreme court only yesterday (I think) upheld the conviction on appeal.