How Umbrellas Became the Symbol of Seattle Protests
"For one, they are a sign that Seattleites marching against police brutality have turned an eye abroad. The bumbershoot tactic has roots in the Hong Kong Umbrella Movement of 2014 when tens of thousands of protesters, demanding open elections, used umbrellas to protect themselves from tear gas released by police. Among the modern protest tactics developed by Hong Kong youth, the yellow umbrella became especially symbolic."
since they snatched the pink umbrella, they've only reinforced the umbrellas