uniforms, including a 24-year-old ex-marine named scott olson. olson had served two tours of duty in iraq during which he turned against the war and began speaking out. other protesters, including jesse palmer, are nearby when police decide to act. >> we were in the intersection, and it was actually fairly calm. and then all of a sudden, the explosions went off and the tear gas was kind of all around us. [ explosions ] >> protester ernest doty, a local artist, is there, too. >> kind of out of nowhere, the whole mood changed. it got very violent very quickly and just got really chaotic. >> in addition to tear gas, police also fire beanbag projectiles and flash-bang grenades, both considered non-lethal crowd control measures. >> then people, of course, started panicking. and then to the right of me, i