Berkeley police learned it's hard to catch who you're chasing after you've pumped tear gas everywhere.
Some Berkeley students preferred the view from inside the glassed buildings where the campus bordered Telegraph Avenue.
This was a day when you might be able to read a badge number, if your eyes weren't too teary from tear gas.
Some students thought the Peoples Park battle was a football game, and took stadium seats up above the field.
The policeman leading the charge is holding a tear gas generating machine. It might have inspired the invention of the lawn blower.
Medics volunteered for duty, but the need overran the supply of helpers.
He's taking a cigarette break on Telegraph Avenue
Tear gas was a nuisance, but it did not cause people to go home
Wet bandanas did much to filter the tear gas, and made it easier to breathe
Washing out your eyes proved to be a great relief for many.
Berkeley police were accustomed to calmer moments, when conversations with the public were easy going
It was April 1969, and the university had let a plot of land they owned in downtown Berkeley fill with debris. On April 20, more than 100 people started building a park there. Hundreds more followed, contributing trees, flowers, and sod. By mid-May, they had built Peoples Park. The university's eviction order sparked a fight that peaked on May 15, a day that would come to be called Bloody Thursday.