PHOTOS: The legacy of Martin Luther King, Jr.

Dr. Martin Luther King, Jr. is seen, date and location unknown (AP)

The National Civil Rights Museum, built around the motel where the Rev. Martin Luther King Jr. was assassinated in 1968 (AP)

The balcony of the Loraine Hotel where Dr. Martin Luther King, Jr. was assassinated is seen and is now part of the The National Civil Rights Museum (AP)

The room at the Loraine Hotel which Dr. Martin Luther King, Jr. occupied the night before his assassination (AP)

A model of the Martin Luther King National Memorial in seen in Washington, Tuesday, June 5, 2007 (AP)

Dr. Martin Luther King Jr. and his wife, Coretta Scott King, sit with three of their four children in their Atlanta, Ga, home, on March 17, 1963 (AP)

The Martin Luther King Bridge, top, and Eads Bridge, bottom, both crossing the Mississippi River, are seen from East St. Louis, Ill. (AP)

Prince Charles, the Prince of Wales, right, and Camilla the Duchess of Cornwall pick up brushes and contribute to a mural of Dr. Martin Luther King, Jr. (AP)

Martin Luther King, III, one of Martin Luther King , Jr.'s sons (AP)

A Montgomery Sheriff's Department booking photo of The Rev. Martin Luther King Jr. taken Feb 22, 1956 (AP)

The children of the Rev. Martin Luther King Jr. and Coretta Scott King (AP)

The Rev. Martin Luther King of the Southern Christian Leadership Conference, holds news conference today March 26, 1964 at the capital (AP)

Rev. Bernice Albertine King applauds as her mother, Coretta Scott King, speaks during The Martin Luther King, Jr. Annual Commemorative Service (AP)

Julian Bond and Dr. Martin Luther King Jr. casting their ballots to fill Bond's vacant seat in the U.S. House of Representatives in Atlanta (AP)

An undated picture of Dr. Martin Luther King, Jr.'s birthplace, 501 Auburn Avenue N.E., Atlanta, Ga. Dr. King was born here, January 15, 1929 (AP)

A brace of plow mules drawing the farm wagon bearing the mahogany casket of Dr. Martin Luther King, Jr., on April 9, 1968. (AP)