Powell : I just did n't have the passion that a Barack Obama or George Bush has . CNN 's John Roberts contributed to this report . John Donvan: Poverty `` one of the most important challenges facing the world , '' ex-general says . Iraq , Guantanamo , Abu Ghraib among factors damaging U.S. reputation in world .
Powell : I just did n't have the passion that a Barack Obama or George Bush has . John Donvan: Poverty `` one of the most important challenges facing the world , '' ex-general says . Iraq , Guantanamo , Abu Ghraib among factors damaging U.S. reputation in world .