[POV] DOCUMENTARY FILM "TRACES OF THE TRADE" - First-time filmmaker Katrina Browne makes a troubling discovery — her New England ancestors were the largest slave-trading family in U.S. history. [NOTE: POV (a cinema term for “point of view”) is television's longest-running showcase for independent nonfiction films. POV premieres 14-16 of the best, boldest and most innovative programs every year on PBS.]
