Albert Einstein Einstein did not return to Germany. He settled in the United States and became an American citizen in 1940. On the eve of World War II, he endorsed a letter to President Franklin D. Roosevelt alerting him to the potential development of "extremely powerful bombs of a new type" and recommending that the US begin similar research. This eventually led to the Manhattan Project. Einstein supported the Allies, but he generally denounced the idea of using nuclear fission as a weapon. He signed the Russell–Einstein Manifesto with British philosopher Bertrand Russell, which highlighted the danger of nuclear weapons. He was
UNESCO Albert Einstein medal UNESCO Albert Einstein medal The UNESCO Albert Einstein Medal is awarded to outstanding scientific personalities who made a great contribution to science and international scientific cooperation. The medal was established by UNESCO to celebrate the centenary of the birth of Albert Einstein in 1979. The medal is awarded in gold, silver and bronze. The medal was designed by the French engraver Max Léognany. The medal's obverse features a portrait of Albert Einstein in his later years. On the reverse, a silhouette of Einstein’s head forms the backdrop for three of the mathematical equations that sum up his essential contributions to