Co-anchors of PBS News Hour (1975), Gwen Ifill and Judy Woodruff, visit The Colbert Report.Co-anchors of PBS News Hour (1975), Gwen Ifill and Judy Woodruff, visit The Colbert Report.Co-anchors of PBS News Hour (1975), Gwen Ifill and Judy Woodruff, visit The Colbert Report.