Obama remembers Sept. 11, calls for unity

President Barack Obama stands with Defense Secretary Robert Gates, left, and Joint Chiefs Chairman Adm. Michael Mullen, as he speaks at the Pentagon Memorial, marking the ninth anniversary of the September 11 attacks, Saturday, Sept. 11, 2010. (AP Photo/Charles Dharapak)

September 11, 2010 1:23:12 PM PDT
President Obama has a message on this day of remembrance.