The concept of "un-Americanism," so vital to the HUAC crusade of the 1940s and 1950s, was resoundingly revived in the emotional rhetoric that followed the September 11th terrorist attacks. Today's political and cultural climate makes it more crucial than ever to come to terms with the consequences of this earlier period of repression and with the contested claims of Americanism that it generated. "Un-American" Hollywood reopens the...