[DOC] [TLE] EinsteinSzilrd letter - Wikipedia [PAR] The EinsteinSzilrd letter was a letter written by Le Szilrd and signed by 
Albert Einstein that was sent to the United States President Franklin D. Roosevelt 
on August 2, 1939. ... Szilrd teamed up with Fermi to build a nuclear reactor from 
natural uranium at Columbia ... Wigner wrote it down, and Einstein signed it. [DOC] [TLE] The Manhattan Project - American Museum of Natural History [PAR] But before such a weapon could be built, numerous technical problems had to be 
overcome. ... Einstein's 1939 letter helped initiate the U.S. effort to build an atomic 
bomb, but ... Project, the scientific and military undertaking to develop the bomb. 
... In August 1939, Einstein wrote to U.S. President Franklin Roosevelt to warn... [DOC] [TLE] Einstein's letter to Roosevelt, August 2, 1939 - Gene Dannen [PAR] May 12, 1996 ... In the summer of 1939, six months after the discovery of uranium ... If atomic 
bombs were possible, as he believed they were, Nazi ... Sachs, who was an 
unofficial adviser to President Franklin Roosevelt, urged that ... If Einstein wrote 
such a letter, Sachs promised to deliver it to the President personally. [DOC] [TLE] Introduction | The Manhattan Project: Making the Atomic Bomb ... [PAR] Sachs read from a cover letter he had prepared and briefed Roosevelt on the ... 
the race to build an atomic bomb and to warn that Hitler would be more than 
willing to ... Roosevelt wrote Einstein back on October 19, 1939, informing the 
physicist ... This project is part of the National Science Digital Library and was 
funded by... [DOC] [TLE] Albert Einstein's letters to President Franklin Delano Roosevelt  E ... [PAR] Albert Einstein's letters to President Franklin Delano Roosevelt ... Long Island, 
August 2nd 1939, it was most likely written by Leo Szilard, the scientist who ... 
Szilard in America - that it may become possible to set up a nuclear chain 
reaction in a ... This new phenomenon would also lead to the construction of 
bombs, and it is... [DOC] [TLE] The Manhattan Project [ushistory.org] [PAR] Early in 1939, the world's scientific community discovered that German ... Einstein 
penned a letter to President Roosevelt urging the development of an atomic 
research ... In late 1941, the American effort to design and build an atomic bomb 
... It is the result of a 1962 test investigating whether nuclear weapons could be 
used... [DOC] [TLE] World War II History for Kids: The Atomic Bomb - Ducksters [PAR] At the start of World War II in 1939 the atomic bomb had not yet been invented. ... 
This type of bomb could destroy large cities in a single blast and would change ... 
He wrote a letter to US President Franklin Roosevelt telling him about the atom 
bomb. ... The lead scientist on the Manhattan Project was J. Robert Oppenheimer
. [DOC] [TLE] Nuclear Weapons and the Responsibility of Scientists [PAR] Oct 4, 2007 ... "Let's build the better world together" ... By 1939 Einstein was living in the United 
States, a refugee from ... to sign a letter explaining the danger to President 
Franklin Roosevelt. ... Atomic bombs can now be made cheaply and in large 
number. ... Einstein wrote another letter to Roosevelt on Szilard's behalf. [DOC] [TLE] Lise Meitner (1878-1968) - Planet Science [PAR] It could even be said that even though she didn't find all the pieces herself ... A 
certain Albert Einstein had also been following Meitner's work and in 1939 he 
wrote a letter to the American president, Franklin D. Roosevelt, explaining what it 
meant. Einstein feared that Germany would make an atomic bomb before the 
allies. [DOC] [TLE] World War II: Second Atomic Bomb That Ended the War | HistoryNet [PAR] But the immense havoc a single bomb could produce was unimaginable, and .... 
a refugee scientist, and winner of the 1921 Nobel Prize for physics, to explain the 
... in America, wrote a letter in August 1939 to President Franklin D. Roosevelt. ... 
of fellow scientists at the University of Chicago, built the first nuclear reactor on a
... [DOC] [TLE] Assessing the Decision to Build

Question: In 1939, this scientist wrote FDR a letter explaining that an atomic bomb could be built
Answer: Albert Einstein