Biden quietly marks milestone 9/11 anniversary on visits to memorials

Biden began his day at the Sept. 11 memorial in Lower Manhattan, alongside dozens of other political dignitaries including former presidents Bill Clinton and Barack Obama. He later traveled to Shanksville, Pa., to meet privately with family members of the victims of Flight 93 and finally, to the National 9/11 Pentagon Memorial in Arlington, Va., to participate in another wreath laying ceremony.