The phrase Black Lives Matter emerged in 2013 as a hashtag created by Alicia Garza, Patrisse Cullors and Opal Tometi after the acquittal in the killing of Trayvon Martin, growing into a decentralised movement against racialised violence. The chant itself became one of the movement's most recognisable audio signatures at rallies worldwide, including the recording here, taken at a protest just before demonstrators began marching. Its continued use in videos, news packages and classroom material reflects how deeply the chant is tied to public demonstrations for justice.