It was twenty years ago this month that the George W Bush administration began its ill-fated invasion and occupation of Iraq. The ostensible justification for this war of choice was that the Iraqi regime had weapons of mass destruction that it might someday use against the United States. This premise proved to be false and today the Iraq war is widely regarded to have been a massive strategic blunder. It resulted in the deaths of over 4,000 American service members and hundreds of thousands of Iraqis.  I'm joined today by journalist Spencer Ackerman. In our conversation we ask the question, now with 20 years of hindsight, "why did the US launch this war?" We also discuss the many lasting legacies of this decision on US foreign policy and international relations today?   Spencer Ackerman is a foreign policy columnist for The Nation the writes the newsletter Forever Wars. He is the author of Reign of Terror: How the 9/11 Era Destabilized America and Produced Trump, now out in paperback.