FRONTLINE's special four-part series "News War" examines the challenges facing today's mainstream media and how print, broadcast and electronic news organizations are struggling with, and adjusting to, these new challenges. If you missed the original television broadcast you can watch the full series online. FRONTLINE's site also offers extended interviews and other supplemental material not included in the broadcast. From the FRONTLINE site: In a four-part special series, News War, FRONTLINE examines the political, cultural, legal, and economic forces challenging the news media today and how the press has reacted in turn. Through interviews with key figures in print, broadcast and electronic media over the past four decades -- and with unequaled, behind-the-scenes access to some of today's most important news organizations, FRONTLINE traces the recent history of American journalism, from the Nixon administration's attacks on the media to the post-Watergate popularity of the press, to the new challenges presented by the…