Answer:The Chinese Exclusion Act of 1882 was the first significant law restricting immigration into the United States. Many Americans on the West Coast attributed declining wages and economic ills to Chinese workers. Although the Chinese composed only .002 percent of the nation's population, Congress passed the exclusion act to placate worker demands and assuage prevalent concerns about maintaining white "racial purity."
Explanation:
They flew a bomber to Hiroshima, Japan and dropped a atomic bomb which took out several cities.
Mass production of steel, large suspension bridges, steel frame construction in buildings. It allowed impurities to be removed cheaply and easily, enabling steel to be produced in mass quantities.
