"The March on Washington grew out of a long, sometimes complicated, but 
often close relationship between the civil rights and labor movements 
that persists to this day. One of King’s closest associates—and the 
guiding hand behind the March—was A. Philip Randolph, the founder of the
 Brotherhood of Sleeping Car Porters, a union of black men who worked on
 America’s railways, carrying luggage, waiting on passengers, and 
serving food. The 1963 march was the culmination of Randolph’s lifetime 
fighting for racial equality and unionism." [
Read more]