President Lyndon Johnson hands President Harry S. Truman a pen at the signing of the Medicare Bill at the Harry S. Truman Library, Independence, Missouri

In this photograph, President Lyndon Johnson hands President Harry S. Truman a pen as Lady Bird Johnson, Vice President Hubert Humphrey, and Bess Truman look on. July 30, 1965. (Photo courtesy of Lyndon B. Johnson Presidential Library, U.S. National Archives)