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On the day Martin Luther King was killed, Jimi Hendrix had two concerts scheduled and only gave one, in which he dedicated a song to him,
House burning down, which he wrote especially for him. from Electric Ladyland, details his reaction to the activist's death and the subsequent riots.
Hendrix was under pressure from friends associated with the Black Panthers to take violent action after King's assassination.
Despite donating money to the Panthers, Hendrix remained an advocate of nonviolence.
Sources:
Martin Luther King's Birthday.