WASHINGTON The chaos and terror that swept across the nation 23 years ago is increasingly becoming a distant memory for many Americans, even as the global shockwaves that followed the Sept. 11, 2001 terror attacks continue to be felt. For those who lived through that terrifying and sobering morning, watching as scene after scene of carnage unfolded in New York City before spreading further, the horror lives on. It all started when a passenger plane slammed into the North Tower of the World