William Henry Harrison, America’s 9th President, was born this week in 1773. Harrison probably would not be pleased to learn his greatest legacy: establishing the system for presidential succession, by dying in office. The Constitution has surprisingly unclear terms about succession, so when Harrison died in 1841, no one knew if the Vice President would

This week in 1910, former President Theodore Roosevelt became the first U.S. chief executive to fly in an airplane. More than 10,000 people attended the event at Kinloch Field in St. Louis. The pilot, Archibald Hoxsey, flew Roosevelt around the field twice, for a distance of about three miles, in a flight lasting three minutes