Today is the 300th day of the year, with only 65 days remaining until the end of the year.
312 - Constantine the Great, is said to have received his famous "Vision of the Cross."
1682 - The city of Philadelphia, Pennsylvania is founded. It will be instrumental in the defining moments of United States history.
1838 - Missouri Governor, Lilburn Boggs, issues the Extermination Order, claiming that all Mormons must leave the state of be executed.
1904 - The first underground New York City Subway line opens, the system becomes the largest in the the U.S. and one of the biggest in the world.
1954 - Benjamin O. Davis Jr., becomes the first African-American general in the United States Armed Forces.
1961 - NASA launches the first Saturn I rocket into space.
1973 - The Canon City meteorite, a 1.4 kg chondrite-type, strikes in Fremont County, Colorado.
1988 - Ronald Reagan decides to tear down the new U.S. Embassy in Moscow, because of Soviet listening devices in the building structure.
1991 - Turkmenistan achieves its independence from the Union of Soviet Socialist Republics.
1994 - The United States prison population exceeds one millions for the first time.