MLK's daughter tweets heartfelt tribute on his birthday

On Sunday, what would have been Martin Luther King, Jr.'s 88th birthday, his daughter, Bernice, tweeted a heartfelt tribute, honoring the civil rights icon and sharing an image of her standing with the monument to her father.

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The memorial, located in downtown Washington, D.C., was opened in 2011.

Look back on King's March on Washington:

Born just five months before King's iconic "I Have A Dream" speech, Bernice was appointed as CEO of The King Center in 2012.

Last week, in honor of this year's Martin Luther King Day, President Obama designated three Civil Rights sites as national monuments, including the A.G. Gaston Motel in Birmingham, Alabama, which served as a headquarters for the Civil Rights leaders, including King.