This week, we continue our series of "time capsule" programs,each one exploring another facet, decade or period of America in the twentieth century.This week, science brings an end to World War Twoand lays the groundwork for a new attention to research, development, and scientific education in the years to come.World War Two ended with an action that was never taken before in the history of warfare, and has never been taken since.It required the efforts of a team of scientists. Working in secrecy, they designed and built the first atomic bombs.President Harry S. Truman made the decision to use these weapons against Japan in August of nineteen forty-five."The world will note that the first atomic bomb was dropped on Hiroshima.We shall continue to use it until we destroy Japan's power to make war."America's use of atomic weapons brought years of conflict in Europe and the Pacific to an end.