Mezzo-soprano Denyce Graves, performs at the "Concert for Hope" at the Kennedy Center, Sunday, Sept. 11, 2011, to mark the 10th anniversary of the Sept. 11 terrorist attacks. (AP Photo/Manuel Balce ... more 
Mezzo-soprano Denyce Graves, performs at the "Concert for Hope" at the Kennedy Center, Sunday, Sept. 11, 2011, to mark the 10th anniversary of the Sept. 11 terrorist attacks. (AP Photo/Manuel Balce Ceneta) less 
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Associated Press | Photo By Manuel Balce Ceneta
Sun, Sep 11, 2011 9:19 PM EDT