What is the moral dilemma in Einstein's Letter?

Einstein's letter, addressed to President Franklin D. Roosevelt in 1939, presents a moral dilemma regarding the development of atomic weapons. The letter highlights the urgency of nuclear research in the context of World War II and the fear that Nazi Germany might create such weapons first. The dilemma lies in the ethical implications of using scientific knowledge for destructive purposes versus the need to protect humanity from tyranny. It raises questions about the responsibility of scientists and the potential consequences of their discoveries.