Paul Simon performed "Sound Of Silence" at the 9/11 Memorial Ceremony on Sunday. It was not "Bridge Over Troubled Water" as the television caption suggested, yet Simon's last-minute change was an indisputable highlight. The 10th anniversary tribute, marked by the reading of the names of the 2,983 victims by their family members, was made all the more poignant by Simon's quiet voice, more moving and likely much less divisive than Joe Scarborough's recent 9/11 musical tribute. Simon's presence at Ground Zero also recalls his rendition of "The Boxer" on Saturday Night Live from September 29, 2001, the show's first live episode after the attacks, which featured an opening from then-Mayor Rudy Giuliani and members of the NYPD and FDNY. Watch the two performances below and know that if you ever need to cry, you can always put on some Simon & Garfunkel.