In 1927, the most destructive river flood in U.S. history inundated seven states, displaced more than half a million people for months, and caused about $1 billion dollars in property damages. And like many national emergencies it exposed a stark question that the country still struggles to answer - what is the political calculus used to decide who bears the ultimate responsibility in a crisis, especially when it comes to the most vulnerable? This week, the Great Mississippi Flood of 1927 and what came after.