Martin Luther King III discusses the significance of the 50th anniversary of the March on Washington, and said he was disappointed by the lack of GOP participation in the day's events. (Hamil R. Harris/The Washington Post)

Long after the official program was over and the large crowd had drifted off the National Mall, Martin Luther King III remained on the plaza of the Lincoln Memorial shaking hands with ordinary people and taking questions about a very special day.

"It was a mountain top experience," King said of Wednesday’s official commemoration of the 1963 March on Washington. "The President of the United States delivered this commemorative address along with two former Presidents and to be with my wife and daughter and both my brother, his wife and my sister and other family members was certainly most special."

Like perhaps no other African American family, the descendants of Martin Luther King Jr have always been connected to one of the most tragic days in American history. But Wednesday was their day to come together and celebrate the most iconic moment of their father’s legacy.

"The thing that resonated with me was when they kept saying we had not realize the dream yet,” King said. “President Obama, President Clinton, President Carter and others said the same thing through out the day which lets us done that the work is not done.”