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PHILADELPHIA - MAY 17: Bono, lead singer and songwriter for the rock group U2 and a social-justice activist gives a peace sign after he received an honorary Doctor of Laws degree at the 248th Commencement of the University of Pennsylvania May 17, 2004 in Philadelphia, Pennsylvania. Bono co-founded the organization Debt AIDS Trade Africa in 2002 together with activists from the Jubilee 2000 Drop the Debt campaign. DATA's main objective is to raise public awareness and action in the United States and other wealthy nations against AIDS and poverty in Africa.(Photo by William Thomas Cain/Getty Images)