Prayer Pilgrimage for Freedom
... that Martin Luther King's speech at the 1957 Prayer Pilgrimage for Freedom, a non-violent demonstration in Washington, DC, established him as a national leader for the Civil Rights Movement?
... that <a class="mw-redirect" href="./Martin_Luther_King" id="mwEl4" rel="mw:WikiLink" title="Martin Luther King">Martin Luther King</a>'s speech at  the 1957 <i id="mwEl8"><b id="mwEmA"><a href="./Prayer_Pilgrimage_for_Freedom" id="mwEmE" rel="mw:WikiLink" title="Prayer Pilgrimage for Freedom">Prayer Pilgrimage for Freedom</a></b></i>, a non-violent demonstration in <a class="mw-redirect" href="./Washington,_DC" id="mwEmI" rel="mw:WikiLink" title="Washington, DC">Washington, DC</a>, established him as a national leader for the <a href="./Civil_rights_movement" id="mwEmM" rel="mw:WikiLink" title="Civil rights movement">Civil Rights Movement</a>?