The Manhattan Project was a project that produced the first nuclear weapons during World War II. It all started when Einstein found out the Germans were working on a new and more powerful weapon for war. Einstein wrote a letter to the president which helped initiate the effort to build an atomic bomb. In December 1941 the government launched the Manhattan project. The project was originally named Development of Substitute Materials. It included over 30 different research and production sites. It took place in Oak Ridge, Tennessee. The Manhattan Project made three bombs: Gadget, Little Boy, and Fat Man. To get people to move there and participate they asked young people if they wanted to help out with the war. That was all they knew
