There's a brief clip at the start of "Sink the Bismarck" (1960) that illustrates the impact of Edward R. Murrow's potent and succinct style of broadcasting that eventually led to him receiving an award from his peers at the beginning of this film. It's his acceptance speech that sets the tone for a retrospective that focuses on his time attempting to stand up for the civil liberties of many American people during the investigations by Senator Joseph McCarthy of Minnesota into the alleged infiltration of just about all aspects of society by communists and their allies. David Strathairn…