Bob Woodruff and Terry Moran will split “World News Tonight” weekend anchor duties for ABC News. Mr. Woodruff, the correspondent who had been sharing Saturday night duties with Elizabeth Vargas since 2002, now is the primary Saturday anchor. Mr. Moran will anchor Sundays in addition to continuing as chief White House correspondent. Ms. Vargas will become John Stossel’s co-anchor on “20/20” this fall after Barbara Walters’ reduces her workload.#