1847 – Mormon leader Brigham Young and his followers arrived in the valley of the Great Salt Lake in present-day Utah.

1847 – Richard M. Hoe patented the rotary-type printing press.

1849 – Georgetown University in Washington, DC, presented its first Doctor of Music Degree. It was given to Professor Henry Dielman.

1866 – Tennessee became the first state to be readmitted to the Union after the U.S. Civil War.

1923 – The Treaty of Lausanne, which settled the boundaries of modern Turkey, was concluded in Switzerland.

1929 – U.S. President Hoover proclaimed the Kellogg-Briand Pact, which renounced war as an instrument of foreign policy.

1948 – Soviet occupation forces in Germany blockaded West Berlin. The U.S.-British airlift began the following day.

1956 – Dean Martin and Jerry Lewis ended their team. They ended the partnership a decade after it began on July 25, 1946.

1969 – The Apollo 11 astronauts splashed down safely in the Pacific Ocean.

1974 – The U.S. Supreme Court unanimously ruled that President Nixon had to turn over subpoenaed White House tape recordings to the Watergate special prosecutor.