Which aspect of the March on Washington sent a powerful statement to the United States and the world?

Two aspects were very powerful statements. The first aspect was the march itself. There were people of all different types of ethnicities marching. African-Americans were not the only ones there. Another aspect was the speech made by Rev. Martin Luther King Jr. The speech called for equality and for future African-Americans to be judged not by the color of their skin but by the contents of their character.