The development of emergency management over the past 60 years in the United States can be best described as transition from "You're On Your Own" before 1950, to "Comprehensive Emergency Management" by 2001. Using TWO OR THREE EXAMPLES from this period, IN 4-5 SENTENCES, describe THIS TRANSITION as if you were explaining it to a family member or friend. I.e. what happened, and how did it influence our pathway towards comprehensive emergency management