The Martin Luther King Jr. Memorial on the Tidal Basin. (Charles Dharapak/Associated Press)

The 50th anniversary of the 1963 March on Washington is Aug. 28. Big crowds are expected in D.C. for the anniversary celebration, which will look back at the 50 years since the Rev. Martin Luther King Jr.’s “I Have a Dream” speech and contemplate what lies ahead.

The Post wants to hear from you as the anniversary approaches. What has changed over the last 50 years? What is the same? And what challenges will Americans face going forward?

Head here to submit your thoughts, insights and experiences.