In this Thursday, May 30, 2013 photo, a man seen wearing a make-shift gas-mask hours before riot police use tear gas and pressurized water to quash a peaceful demonstration by hundreds of people staging a sit-in protest to try and prevent the demolition of trees at an Istanbul park, Turkey. Police moved in at dawn Friday to disperse the crowd on the fourth day of the protest against a contentious government plan to revamp Istanbul’s main square, Taksim, injuring a number of protesters. The protesters are demanding that the square’s park, Gezi, is protected. (AP Photo)