A crowd of over one hundred thousand, predominantly African Americans, gathered in Washington for the civil rights March on Washington for Jobs and Freedom on August 28, 1963. Kennedy initially opposed the march, fearing it would have a negative effect on the prospects for the civil rights bills pending in Congress. These fears were heightened just prior to the march when FBI Director J. Edgar Hoover presented Kennedy with reports that some of civil rights leader Martin Luther King Jr.'s close advisers, specifically Jack O'Dell and Stanley Levison, were communists. When King ignored the administration's warning, Robert Kennedy issued a directive authorizing the FBI to wiretap King and other leaders of the Southern Christian Leadership Conference. Although Kennedy only gave written approval for limited wiretapping of King's phones "on a trial basis, for a month or so", Hoover extended the clearance so his men were "unshackled" to look for evidence in any areas of King's life they deemed worthy. The wiretapping continued through June 1966 and was revealed in 1968.
