Mobilization and logistics were administered by Rustin, a civil rights veteran and organizer of the 1947 Journey of Reconciliation, the first of the Freedom Rides to test the Supreme Court ruling that banned racial discrimination in interstate travel. Rustin was a long-time associate of both Randolph and Dr. King. With Randolph concentrating on building the march's political coalition, Rustin built and led the team of two hundred activists and organizers who publicized the march and recruited the marchers, coordinated the buses and trains, provided the marshals, and set up and administered all of the logistic details of a mass march in the nation's capital. During the days leading up to the march, these 200 volunteers used the ballroom of Washington DC radio station WUST as their operations headquarters.