Americans will commemorate Sept. 11 in Shanksville, where Flight 93 crashed after flyers fought back
Americans will honor the lives lost on Sept. 11, 2001, at the Flight 93 National Memorial in Shanksville, Pennsylvania. CBS News' Nicole Sganga reports.
<p>Americans will honor the lives lost on Sept. 11, 2001, at the Flight 93 National Memorial in Shanksville, Pennsylvania. CBS News' Nicole Sganga reports.</p>