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In this June 29, 1973 photo, former White House aide Charles Colson enters a House intelligence subcommittee in Washington. Colson, the tough-as-nails special counsel to President Richard Nixon who went to prison for his role in a Watergate-related case and became a Christian evangelical helping inmates, has died. He was 80. Jim Liske, chief executive of the Lansdowne-based Prison Fellowship Ministries that Colson founded, said Colson died Saturday, April 21, 2012.