https://www.vice.com/en_us/article/5dzdeq/arizona-cops-use-drone-surveillance-to-arrest-protesters > Police in Tempe, Arizona used drone surveillance footage as justification for the arrest of three protesters this weekend. Police alleged that three people stopped traffic during a Black Lives Matter protest outside a Barnes & Noble bookstore. > Arizona activists organized a “chalk walk” over the weekend where protesters would gather to write on sidewalks in chalk to declare their support for the racial justice movement. Police took three people into custody, alleging that two had damaged a passing car and a third had prevented the police from making an arrest.