A pair of “guerrilla artists” walked into the new Tate Modern museum and urinated in Marcel Duchamp’s “Fountain.” “The pair claimed that the purpose of their action was to ‘celebrate the spirit of modern art.’ Bemused onlookers in the room applauded, thinking that they had just seen an officially planned performance. The artists claim that after their performance, which lasted about a minute, the Tate closed the room to the public but made no attempt to apprehend them.” – The Guardian