 The most notorious protest was the Pussy Riot performance on 21 February, and subsequent trial.An estimated 8,000–20,000 protesters gathered in Moscow on 6 May, when eighty people were injured in confrontations with police, and 450 were arrested, with another 120 arrests taking place the following day.In 2012 and 2013, Putin and the United Russia party backed stricter legislation against the LGBT community, in Saint Petersburg, Archangelsk and Novosibirsk; a law called the Russian gay propaganda law, that is against "homosexual propaganda" (which prohibits such symbols as the rainbow flag as well as published works containing homosexual content) was adopted by the State Duma in June 2013.