i'm catherine kobiyashi in tokyo. turkey's prime minister says he will not yield to protesters. erred juan has demanded an immediate end to almost two weeks of demonstrations. but protesters entered istanbul's thaksin square once again under a cloud of discontent. police sent them scattering under clouds of tear gas. riot police stormed the square at the heart of central istanbul. they fired volleys of tear gas into the crowds. they targeted some protesters with the force of their water cannon. protesters fled into side streets and buildings, but gradually made their way back into the square. by evening, tens of thousands of demonstrators had gathered to renew their cause that erdowan step aside. some hurled stones at police who responded with the same tactics they used earlier in the day. some protesters have set up camp in a nearby park the government plans to redevelop. they say the redevelopment is yet another example of what they say is erdowan's authoritarian stale. the prime minister was scheduled to meet during the day with protest leaders, but the latest police response