The content originally appeared on: CNN Editor's Note: Peter Bergen is CNN's national security analyst, a vice president at New America and a professor of practice at Arizona State University. He is the author of 'The Cost of Chaos: The Trump Administration and the World.' The views expressed in this commentary are his own. View more opinion on CNN. Sulaymaniyah, Iraq CNN - Two decades ago, on March 19, 2003, then-President George W. Bush ordered the US invasion of Iraq. […]