Martin Luther King, Jr. is regarded as the most influential leader of the American civil rights movement (Credit: Cannon.af.mil)

Martin Luther King Jr. (MLK), whose life and legacy is celebrated annually on the third Monday of January, was an extraordinary man. It is thanks to the vision, courage, and leadership of the clergyman-turned-civil-rights-activist that all Americans are granted equal rights, regardless of race, color, religion, or national origin.