He could have taken out Bin Laden prior to 9-11 but didn't.
...most damning are the documents showing that the CIA had Bin Laden in its crosshairs a full year before 9/11 — but didn’t get the funding from the Bush administration White House to take him out or even continue monitoring him. The CIA materials directly contradict the many claims of Bush officials that it was aggressively pursuing Al Qaida prior to 9/11, and that nobody could have predicted the attacks.
That fucker through his gross incompetence, is resposible for the deaths of thousands of US citizens that he could have prevented, if he only gave a shit.