SIDEBAR NOTE: Five years, half a decade of war. 4,000 Americans dead. (Nearly one million Iraqis dead.) $3 trillion down the hole. Iraqi society devastated, basic services still unavailable to many. Internal displacement and refugees in the millions. Terrorism a bigger threat to the United States than ever. Al Qaeda and Taliban resurgent, the Hydra that endures our fire, enriched by the conflagration we initiated by invading Iraq. It’s time to leave Mesopotamia like the British have before us so long ago. The question now is how to exit without ensuring imminent genocide and a deepening of the ethnic cleansing and humanitarian crisis that already exists. It’s also time to put out to pasture the war criminals in our capital seat who have killed thousands of our sons, daughters, mothers and fathers, and maimed, scarred and crippled many thousands more.