Biofuels attract lots of money and political support in the USA, but they have lots of environmental and economic shortcomings. Captain Todd A. “Ike†Kiefer has written a comprehensive, penetrating critique, “Twenty-First Century Snake Oil: Why the United States Should Reject Biofuels as Part of a Rational National Security Energy Strategy.†Jesse Ausubel and Paul Waggoner mentored Captain Kiefer on aspects of his study.