A worker cleans near an exhibit by Danish conceptual artist Kristian von Hornsleth at the Ujazdowski Castle Center for Contemporary Art in Warsaw, Poland, Wednesday Aug. 25, 2021. The exhibition which opens Friday at the Polish state museum features the works of provocative artists in what organizers describe as a celebration of free speech, and a challenge to political correctness and "cancel culture" on the political left. Some critics, however, accuse the organizers of the show titled "Political Art" of giving a platform to anti-Semitic, racist and Islamophobic messages. (AP Photo/Czarek Sokolowski)