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Overall , the lifts produced in this phase of the project were better than those produced in the initial phase reported by Welch . Also at stake would be any improvements for workers , such as a real increase in the minimum wage , if the costs to states for applying new safeguards for their own employees reach $ 62 million or more . Unable to stop the cascade of concrete before the worker suffocated , supervisors had no choice but to allow the concrete to continue flowing - - covering the worker and sealing him in the dam . Beginning with the Yalta and Potsdam conferences at the end of World War II , we shall consider the reasons for the division of Germany , examining the different structures that emerged in the two republics and tracing the history of their often stormy relationship during the years that followed .