AMMAN - The horror. The horror. And unlike Apocalypse Now, there are real, not fictional images to prove it. But they won't be seen in Western homes. The new heart of darkness has emerged in the turbulent history of Mesopotamia via the Hilla massacre. After uninterrupted, furious American bombing on Monday night and Tuesday morning, as of Wednesday night there were at least 61 dead Iraqi civilians and more than 450 seriously injured in the region of Hilla, 80 kilometers south of Baghdad. Most are children: 60 percent of Iraq's population of roughly 24 million are children.