On September 11th, 2001, nineteen men armed only with box cutters killed more than 3,000 innocent souls, shattered America's sense of invulnerability, and awakened the nation to the brutal reality of terror. How could such a catastrophe have happened? What was the series of events -- the mistakes, missteps, and unheeded warnings -- that led to the worst attacks on our soil since Pearl Harbor? And how can we prevent another, possibly more devastating...