Huge crowd rallies in Istanbul against Turkey's post-coup crackdown

By Umit Bektas and Humeyra PamukISTANBUL (Reuters) - Turkey's main opposition leader told a huge protest rally on Sunday that the country was living under dictatorship and pledged to keep challenging the crackdown launched by the authorities after last year's failed military coup.Addressing hundreds of thousands of people waving Turkish flags and banners demanding justice, Kemal Kilicdaroglu said his 25-day march from Ankara to Istanbul - culminating in Sunday's rally in Istanbul - was the first