>> i was very angry. i also felt slightly helpless. things would be different now because he was sort of seen as our knight in shining armor. >> crowds gathered along harlem's 125th street within two hours of dr. king's death. and they soon became mobs. >> race riots broke out -- >> in washington, chicago, new york, york, baltimore and sbug. >> 100 cities rage with riot. 39 die. arrested. >> uncontrolled carnival of looting began. >> 50,000 troops to stop them. >> i had not seen that much commotion in the streets possibly ever in my lifetime. >> martin luther king dedicated