Brad Pitt and Ed Norton may re-team for a mini-series playing famous American explorers LEWIS and Clark. The pair are producing the 10-hour saga, based on STEPHEN AMBROSE's book UNDAUNTED COURAGE. Norton explains, "We have friends who've been pointing out that there are some funny echoes, similarities between Lewis and Clark and us. "I don't have any prejudice against it. At the moment, we're acting as good shepherds for the project. It's being written now." Norton, who starred with Pitt in Fight Club, claims Undaunted Courage was one of the "most page-turning books I've ever read." The actor was so inspired by the novel that he decided to produce the project with Pitt for US network HBO.