1. Dr. William Hinton is known worldwide for his two tests that detect syphilis; he's also noted for being the first African American professor at Harvard University.

1. This father Ken Griffey Sr. and son Ken Griffey Jr. are the only father and son in professional baseball history to play on the same team at the same time.

1. Dr. Martin Luther King, Jr.'s birthday is celebrated on third Monday of January.

1. In 1989 Colin L. Powell became the first African American Chairman of the Joint Chief of Staff.