Even the closing of the Bay Bridge could not keep thousands of nostalgic flower children away from San Francisco's Golden Gate Park on Sunday to celebrate the 40th anniversary of the Summer of Love.
More than 100 performers, some who were there the first time around, were scheduled to take to the stage for the free concert commemorating the year San Francisco became the world's countercultural capital.
At least 20,000 fans came together to celebrate peace, love and understanding, organizers said, despite the Labor Day weekend shutdown of the bridge connecting Oakland to San Francisco for repairs.
San Francisco police said that gathering was proceeding harmoniously, with no incidents reported by mid-afternoon.
"Just nothing but love," police Sgt. Mark Im said.