The french & british wanted control over north america
Robert Oppenheimer was put in charge of putting the pieces together at Los Alamos. After the final bill was tallied, nearly $2 billion had been spent on research and development of the atomic bomb. The Manhattan Project employed over 120,000 Americans.
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Lyndon Johnson defeated Barry Goldwater in 1964 by the largest margin in U.S. history, due in part to the fact that he an implemented many popular policies while serving as president after JFK's assassination.