General Myers was asked by the 9/11 Commission why NORAD hadn't been more prepared for the possibility of planes being hijacked and flown into the buildings. It was, he said, because NORAD were "looking outward":
The "looking outward" comment has attracted criticism from across the truth movement. It's false, say some. A lie, claim others. Fortunately the 9/11 Commission have released many documents summarising interviews with other NEADS and NORAD personnel, so there are plenty of additional statements available for comparison.
Myers wasn't the only one talking about NORAD's role, then. Throughout the NEADS and NORAD personnel statements there is general agreement: NORAD primarily looked outwards. Monitoring over the continental US before 9/11 was mostly handled by the FAA.