Nancy Reagan has died. pic.twitter.com/vaJNblJbKc — NASA Watch (@NASAWatch) March 6, 2016 Keith’s note: Nancy Reagan has died. Thus turns the final page from an era wherein space exploration was elevated as an aspirational goal for America as well as a cause to ponder our own mortality. Only after Columbia did we again dwell on such matters as a nation. When Nancy Reagan revealed her husband’s Alzheimer’s diagnosis she helped […]