Margaret M. McMahon, R.N., M.N., C.E.N. is the editor of Disaster Management & Response, a journal of the Emergency Nurses Association, and is the emergency clinical nurse specialist at AtlantiCare Regional Medical Center - Mainland campus, in Pomona, New Jersey. She has over 40 years of professional nursing experience in clinical, administrative, and educational roles settings, including active and reserve duty in the U.S. Army Nurse Corps, where she served as a nuclear, biological, and radiological defense officer. Ms. McMahon is a past president of the national Emergency Nurses Association, and has lectured and published extensively on disaster and emergency care topics.