Tomorrow’s public hearing at Washington Dulles Airport on the FAA’s proposal to make the Washington-Baltimore air defense identification zone (ADIZ) permanent is expected to draw comments from the leaders of at least three general aviation groups. AOPA president Phil Boyer, National Air Transportation Association president Jim Coyne and Helicopter Association International president Matthew Zuccaro are all scheduled to speak in opposition to the ADIZ proposal. The first of two such public meetings, held last Thursday in Columbia, Md., drew more than 300 local pilots. Over the course of six hours, representatives from six federal agencies heard more than 30 speakers, all opposing the permanent ADIZ, which closely mimics the Washington-Baltimore Class B airspace. The comment period closes February 6.