A digest of MLive's series on motorcycle crashes in Michigan and how the project was carried out. Included is a “daily debate” between Dan Petterson and Vince Consiglio. Consiglio is president of ABATE of Michigan, the main organization in the fight to lift Michigan's mandatory helmet law. Petterson is president of the pro-helmet group SMARTER, for Skilled Motorcyclist Association - Responsible, Trained and Educated Riders. Original posting Dec. 2012, updated April 3, 2019.