1776 - US Congress proclaims the Declaration of Independence and independence from Great Britain
1803 - The Louisiana Purchase is announced to the American people by President Thomas Jefferson
1831 - “America (My Country ‘Tis of Thee)” is 1st sung in Boston
1941 - Howard Florey and Norman Heatley meet, 11 days later they successfully recreate penicillin
1970 - Casey Kasem’s “American Top 40” debuts on…
