Pedestrians walk outside ground zero construction site in New York, Tuesday, Sept. 6, 2011. Sept. 11, 2011 will mark the tenth anniversary of the terrorist attacks in the United States.(AP Photo/Oded Balilty) The Associated Press Construction worker walks outside ground zero construction site in New York, Tuesday, Sept. 6, 2011. Sept. 11, 2011 will mark the tenth anniversary of the terrorist attacks in the United States.(AP Photo/Oded Balilty) The Associated PressWASHINGTON (AP) — The significance of Sept. 11 has not waned for many Americans, even a decade after the attacks.A poll by The Associated Press-NORC Center for Public Affairs Research finds more Americans now say Sept. 11 had an impact on their lives than said so five years ago — 57 percent compared with 50 percent in 2006.As the 10th anniversary approaches, the horror that unfolded in New York, Washington and Shanksville, Pa., still evokes a stir of emotions — from anger at so many innocent lives lost to pride in the heroes who emerged on hijacked planes, in the rubble of fallen skyscrapers and at a shattered Pentagon.Lisa Schmidt of Vancouver, Wash., says she thinks about 9/11 "just about every day" and almost every time she sees a plane.