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
Albert Einstein ATV Kourou on 31 August 2012 to begin launch preparations. "Albert Einstein" was launched on an Ariane 5ES rocket from the Guiana Space Centre in Kourou, French Guiana at 21:52:11 UTC on 5 June 2013. The launch was conducted by Arianespace on behalf of the European Space Agency (ESA). At the time of its launch, "Albert Einstein" was the heaviest spacecraft ever launched to orbit by an Ariane rocket, with a total mass of . The ATV docked successfully with the ISS at 14:07 UTC (16:07 CEST) on 15 June 2013. After a successful five-month mission, "Albert Einstein" re-entered the Earth's