UWB HEalthcare Emergency Management Evolution Discussion

I need help with a Health & Medical question. All explanations and answers will be used to help me learn. Based on your readings and experience, compare and contrast how health care emergency management evolved before 9/11 to its evolution after 9/11. Why has the scope of healthcare emergency management grown so dramatically? Will the growth continue?  Readings!Reilly, M., &Markenson, D. S. (2010). Health Care Emergency Management: Principles and PracticeChapter 1: Principles of Emergency Management for Healthcare FacilitiesBarbera J.A., M. A. G., &Yeatts, D. J. (2009). Challenge of hospital emergency preparedness: Analysis and recommendations. Disaster Med Public Health Preparedness, 3(1), 74-82. Sauer, L. M., McCarthy, M. L., Knebel, A., & Brewster, P. (2009). Major influences on hospital emergency management preparedness and disaster preparedness. Disaster Med Public Health Preparedness, 3(1), S68-S73.