Alberto Alemanno, Associate Professor of Law, HEC Paris introduces the workshop by illustrating what happened and lessons learned. Emergency Regulation under the Threat of a Catastrophe: A Hard Look at the Volcanic Ash Crisis. 1st HEC workshop on regulation. Emergency regulation under the thread of a catastrophe: a hard look at the volcanic ash crisis. A conference organised by Alberto Alemanno, HEC Paris. 10 & 11 november 2010. More info at http://www.albertoalemanno.eu