Final answer:
Enrico Fermi and Albert Einstein were leaders in developing atomic power.
Step-by-step explanation:
Answer: Enrico Fermi and Albert Einstein were leaders in developing atomic power.
Enrico Fermi made significant contributions to theoretical physics, including identifying the weak nuclear force and the creation of the first nuclear chain reaction. Albert Einstein, although pacifistic, played a vital role in urging the American government to make efforts in nuclear weapons development. His letter to President Franklin Roosevelt warned of the German potential to build extremely powerful bombs of a new type.