Opinion: Inside Saddam Hussein's 'chamber of horrors,' I reflect on 20 years since the Iraq War

Two decades ago, on March 19, 2003, then-President George W. Bush ordered the US invasion of Iraq. A week later, near Najaf, a city in southern Iraq, then-US Major General David Petraeus turned to the American journalist Rick Atkinson and asked him a simple question: "Tell me how this ends." That remains an excellent question.