Mina Rees born in Cleveland, Ohio. Trained as an algebraist at University of Chicago, she directed the mathematical sciences division of the Office of Naval Research beginning in 1946 and this office remains a major supporter of mathematical research to this day.
Einstein wrote to Roosevelt. On this date Albert Einstein wrote President F. D. Roosevelt that "some recent work by E. Fermi and L. Szilard . . . leads me to expect that the element uranium may be turned into a new and important source of energy in the immediate future. This new phenomenon would also lead to the construction of bombs, and it is conceivable--though much less certain--that extremely powerful bombs of a new type may be constructed." Roosevelt quickly started the Manhattan Project.