Accepting his Oscar for The Fog of War at the 2003 Academy Awards, Errol Morris made one of the night’s memorable speeches. “Forty years ago, this country went down a rabbit hole in Vietnam and millions died. I fear we're going down a rabbit hole once again,” he told a national TV audience. That antiwar peroration may have been de rigueur for the Oscars, but from Morris, who was hardly known for his agitprop tendencies, it was something of a surprise. Then again, so was The Fog of War.