The U.S. invaded Iraq and toppled Saddam Hussein more than 21 years ago, yet the U.S. is still at war there. Why? Against whom? Will American forces ever leave the country U.S. leaders claimed was liberated way back in mid-2003? In this episode, Chatham House analyst Renad Mansour talks about the armed groups that have attacked U.S. bases in Iraq and Syria, triggering tit-for-tat retaliatory airstrikes that damaged the militias' military infrastructure but failed to advance the political and governmental reforms necessary to turn Iraq into a stable nation-state. A generation after invading and causing a catastrophe, the U.S. cannot extricate itself from Iraq. Also, read Renad Mansour's essay about the Iraqi armed groups in Foreign Affairs, the official publication of the Council on Foreign Relations.