Pennies are made from steel for one year, so copper could be used for war materials.
An international conference determines that nations will base the value of their currencies not on the value of gold but on the value of America's dollar, which has a value in gold.
The American dollar becomes the world's reserve currency—they base their money's value on ours.
Soon after Franklin D. Roosevelt's death, his portrait appears on the dime to commemorate his support for the March of Dimes, a program that raises money for research to cure polio.
The wheat design on the back of the Lincoln cent is replaced with the Lincoln Memorial.