In 1919, Congress established Grand Canyon National Park in Arizona.
In 1929, President Coolidge signed a measure establishing Grand Teton National Park.
In 1940, the U.S. Air Defense Command was created.
In 1951, the 22nd Amendment to the Constitution, limiting a president to two terms of office, was ratified.
In 1987, the Tower Commission, which probed the Iran-Contra affair, issued its report, which rebuked President Reagan for failing to control his national security staff.
In 1998, A jury in Amarillo, Texas, rejected an $11 million lawsuit brought by Texas cattlemen who blamed Oprah Winfrey’s talk show for a price fall after a segment on food safety that included a discussion about mad-cow disease.