After the Soviets successfully detonated an atomic bomb in 1949, President Harry S. Truman ordered the creation of a hydrogen bomb project. With the help of the Polish mathematician Stanislaw Ulam, Dr. Teller developed a model for the hydrogen bomb known as the Teller-Ulam design
On September 17, 1787, the Constitution was signed. The Constitution is known to be written by James Madison but is usually credited to other people who had similar ideas for the Constitution.
A using multiple sources to confirm a conclusion
