Much of this is review, but it's always worth a refresher look.

In the summer of 2003, Warren Bass, an investigator for the 9/11 Commission, was digging through highly classified National Security Council documents when he came across a trove of material that startled him. Buried in the files of former White House counterterrorism czar Richard Clarke, the documents seemed to confirm charges that the Bush White House had ignored repeated warnings about the threat posed by Osama bin Laden. Clarke, it turned out, had bombarded national-security adviser Condoleezza Rice in the summer of 2001 with impassioned e-mails and memos warning of an Al Qaeda attack—and urging a more forceful U.S. government response. One e-mail jumped out: it pleaded with officials to imagine how they would feel after a tragedy where "hundreds of Americans lay dead in several countries, including the U.S.," adding that "that future day could happen at any time." The memo was written on Tuesday, Sept. 4, 2001—just one week before the attacks on New York's World Trade Center and the Pentagon.

Clarke "had bombarded" Rice with warnings. It still boggles the mind.