16th century
| First African slaves in North America (c. 1526) |
17th century
| The ‘Mayflower’ arrives in America (November 1620) |
18th century
19th century
20th century
| The Wright Brothers’ Flight (1903) | Martin Luther King’s ‘I Have a Dream Speech’ (August 28th, 1963) |
| Prohibition (January 16th 1920 to March 22 1933) | Apollo 11 Lands on the Moon (July 20th 1969) |
| Jonas Salk’s Polio Vaccine (April 12th, 1955) | Watergate Scandal (June 17th 1972 – August 9th 1974) |
21st century
| Virginia Tech Shootings(April 16th 2007) |