Hans Blix on why invading Iraq was "a terrible mistake"

In an op-ed for CNN.com, Hans Blix writes: "I headed the U.N. inspections in Iraq at the time of the war 10 years ago. Today, I look again at the reasons why this terrible mistake -- and violation of the U.N. charter -- took place and explore if any lessons be drawn. Here are my thoughts. [CNN.com]