Robert Redford has come on board to executive produce the feature documentary Public Trust with Patagonia founder Yvon Chouinard and his Patagonia Films.No Man's Land director David Garrett Byars is behind the doc about America'spublic lands.Through the work of Montana investigative journalist Hal Herring, Public Trust focuses on three land-based conflicts: the slashing of the Bears Ears National Monument in Utah; the potential permanent destruction of the Boundary Waters Wilderness in