Brian Chambers on Instagram: "On this day in 1967, Timothy Leary delivered his now-iconic call to “Turn on, tune in, drop out” at the Human Be-In in Golden Gate Park. The gathering fused the Bay Area subcultures of the era, from Berkeley radicals and Hells Angels to mystics and Diggers, with the psychedelic luminaries of the Beat Generation and “all the rock bands in San Francisco.” The event would serve as the unofficial kickoff to the brief but monumental Summer of Love. The piece shown here i