Einstein’s famous letter was sent soon after the outbreak ... On 16 July 1945 the US detonated the world’s first nuclear bomb in the New Mexico desert. The test was final, terrible proof ...

In 1942, the Manhattan Project needed to create a chain reaction—a crucial step toward proving that it would be possible to make an atomic bomb. The scientists achieved this sustained nuclear ...

Out of fear the Nazis would develop and use a nuclear weapon, Einstein wrote the letter that convinced President Franklin D. Roosevelt to launch an atomic-bomb program. He later regretted it ...

When you hear the name Albert Einstein ... also wrote a famous letter to President Franklin D. Roosevelt, warning him that Germany might build an atomic bomb and urging nuclear research.

Born to Hermann Einstein ... letter to President Franklin Roosevelt not long after the start of World War II that warns of the possibility of Germany's building an atomic bomb and urges nuclear ...