Great human rights warrior Martin Luther King Assassination の Motel transformation の Museum, it seems that it is a short hundred years の American history is actually very contradictory and long! There is a section of American slaves tragic のtriangular trade but objectively promoted the development of Europe and the United States and non-three states at that time! Just like silver coins の positive and negative! As the end said: the great era of Atlantic originates from Greedy! Haha the best and worst have created history, this is the law of contradiction and unity of opposition and the law of the world developmentの!