sentences:  Bono also received the NAACP Image Award's chairman's Award in 2007.On 24 May 2007, the National Constitution Center in Philadelphia announced that Bono would receive the Philadelphia Liberty Medal on 27 September 2007 for his work to end world poverty and hunger.On 28 September 2007, in accepting the Liberty Medal, Bono said, "When you are trapped by poverty, you are not free.