The most iconic American images can stop you in your tracks. Sometimes, they offer snippets of joy — like California hippies dancing at a music festival. Other times, they show flashes of pain — like the flooded streets of New Orleans following Hurricane Katrina in 2005.
Martin Luther King Jr. stands before a crowd of 250,000 people during the March on Washington on Aug. 28, 1963. There, King would give his famous "I Have a Dream" speech, in which he called on Americans to not judge others "by the color of their skin but by the content of their character."
