In 1973, on this day Lyndon B. Johnson died after suffering the third and final heart attack in his lifetime. Unfit for office for two weeks due to suffering from acute chest pains, the closing days of Johnson's Presidency had ended in acrimony. Vice President Hubert Humphrey had been sworn in for a single day according to the US Constitution, with President-elect Richard M Nixon arguing that his Government-in-transition should take office a day early.