 Shortly after the September 11 terrorist attacks, University of Maryland, Baltimore, President David J. Ramsay called on Professor Greenberger to create a center that could bolster the university's extensive work in scientific research, policy development, and legal analysis related to homeland security.On May 15, 2002, CHHS officially opened its doors.The scope of work grew soon after, and by summer 2003 the Maryland Emergency Management Agency asked CHHS to develop a manual to guide Maryland state agencies through the COOP plan writing process.