A Turkish woman argues with riot police officers and ask them to not use tear gas against protesters, saying "no more gas, please," at the main Kizilay Square near the office of Turkish Prime Minister, Recep Tayyip Erdogan, in Ankara, Turkey, Tuesday, June 4, 2013. Protests, the biggest Turkey has seen in recent years, were sparked by a police crackdown of a peaceful sit-in to prevent the demolition of a park in Istanbul. (AP Photo/Burhan Ozbilici)