World War II produced important changes in American life--some trivial, others profound. One striking change involved fashion. To conserve wool and cotton, dresses became shorter and vests and cuffs disappeared, as did double-breasted suits, pleats, and ruffles.
Even more significant was the tremendous increase in mobility. The war set families in motion, pulling them off of farms and out of small towns and packing them into large urban areas. Urbanization had virtually stopped during the Depression, but the war saw the number of city dwellers leap from 46 to 53 percent.
War industries sparked the urban growth. Detroit's population exploded as the automotive industry switched from manufacturing cars to war vehicles. Washington, D.C. became another boomtown, as tens of thousands of new workers staffed the swelling ranks of the bureaucracy. The most dramatic growth occurred in California. Of the 15 million civilians who moved across state lines during the war, over 2 million went to California to work in defense industries.
The Khmer Rouge made quite a few changes during their reign. They outlawed money, books, and religion. They also killed anyone believed to be of the "old society" which included intellectuals, merchants, and former government officials and former soldiers. They killed millions.
Answer:
The Manhattan project
Explanation:
The Manhattan project was a secret project that's developed by United States in 1942. The main goal of this project was to create the first weapon of mass destruction that utilize nuclear energy.
Initially, USA tried to keep this a secret from the Soviet Union.
But the project was leaked to the Soviet Union by Julius and Ethel Rosenberg who were recruited as Soviet's spy. Ethel's brother David Greenglass worked in Manhattan project and supplied Julius with the information.
