FORT WORTH, Texas -- A photograph taken by an NBC 5 employee shows former presidential candidate John Edwards with his videographer, Rielle Hunter, 42, on a stop in Dallas in 2006. The pair were in North Texas during Edwards' book tour. Edwards, who won praise and sympathy as he campaigned side-by-side with his cancer-stricken wife, Elizabeth, admitted Friday he had had an extramarital affair with Hunter. Hunter was working for Edwards producing videos for his campaign. Edwards said he made a serious error in judgment when he had an affair and is ashamed of his conduct.