"Catalyst" is a publication of the U.S. Department of Education's Higher Education Center for Alcohol and Drug Abuse and Violence Prevention. This issue contains the following articles: (1) What Science Tells Us About Impaired Driving Behavior And Consequences Among U.S. College Students; (2) Message From Kevin Jennings, OSDFS Assistant Deputy Secretary; (3) Office of National Drug Control Policy (ONDCP) Drugged Driving Initiative; (4) Q&A With Steven Bloch, Automobile Club of Southern California; (5) Young Women and Drinking and Driving; and (6) Updates.