Sally Field takes on Laura Bush LOS ANGELES, Sept. 28 (UPI) -- Sally Field and Mimi Kennedy will play Laura Bush in a Los Angeles staging of Tony Kushner's play, "Only We Who Guard the Mystery Shall Be Happy." Kushner -- the Pulitzer Prize-winning writer of "Angels in America" -- wrote the play during the lead-up to the U.S. invasion of Iraq in 2003. The Nation magazine published a scene from the play before the war started, and the play has since been read at numerous anti-war rallies. "Only We Who Guard the Mystery Shall Be Happy" -- which is...