What did the einstein-szilard letter warn president roosevelt about in 1939?
a. that the us was secretly researching nuclear weapons
b. that germany was researching nuclear weapons
c. that the us planned to use nuclear weapons against japan
d. that germany planned to use nuclear weapons against japan

The correct answer is b) that Germany was researching nuclear weapons. The letter was penned by Szilard with two fellow Hungarian physicists, Teller and Wigner, and signed by Albert Einstein. It stated that Germany may start making nuclear bombs and that the United States had better watch out for this. President Franklin Roosevelt had a swift response to this and started the Manhattan Project, which was a research project that developed and produced the first atomic bombs in World War II.