/ Source: The Associated Press
Cellist Yo-Yo Ma and singers James Taylor and Paul Simon are among those participating in the Sept. 11 anniversary commemoration at the World Trade Center site.
Ma has performed a piece by Bach, while Taylor has sung "You Can Close Your Eyes" and Simon has performed "The Sound of Silence."
Other musical elements in the commemoration include the Brooklyn Youth Chorus and bagpipers from the fire department, police department and the port authority.