Police in St Louis had to arrest protesters because they were blocking a major street instead of “protesting peaceably”. Other protesters were teargassed and authorities were frustrated that the clouds of gas and spray and people scrambling obscured documentation of rock-throwing which provoked the police officers’ pushback. No heed being paid to what “provoked” the protest in the first place. Not merely the anniversary of Michael Brown’s shooting in Ferguson, but the police killing of another black teen.