In an interview published by NPR’s Book of the Day podcast on Jan. 3, writer Jonathan Eig, who authored the biography 'King: A Life,' said that Dr. Martin Luther King Jr. was "a protest leader ...

Celebrate Martin Luther King Jr.'s legacy with a look back at 15 of his most powerful quotes, including the iconic 'I Have a Dream' speech and more.

His enduring legacy was memorialized when Republican President Ronald Reagan signed the King Holiday bill in 1983, and again during the dedication of the Martin Luther King Jr. Memorial in 2011.