The party at the Salmon Street Springs fountain, a riverfront landmark in the heart of Portland, was just getting started. Dozens of drummers beat out entrancing rhythms and a crowd of hundreds danced joyfully as the setting sun cast a soft pink glow on distant Mount Hood. Poster boards bearing the names of dozens of Black men and women killed by police stirred in a gentle breeze as the energy built to fever pitch and more and more people poured into the square.