Forty years is a long time. Long enough to forget the taste of fear, to let the headlines fade, to convince yourself that a thing that happened is a thing that is finished.It is not.On April 26, the Embassy of Ukraine in Manila, in partnership with the Friedrich Naumann Foundation, marked the 40th anniversary of the Chornobyl nuclear disaster—the largest man-made catastrophe in human history—with a gathering that drew media, academics, and diplo…