A huge demonstration organised by Poland's opposition unfolds in the streets of the capital, Warsaw. Half a million protesters packed the streets of central Warsaw on Sunday, Poland's opposition organisers said, claiming one of the biggest anti-government demonstrations in the 30 years since the end of communism. The leaders of most opposition parties encouraged their supporters to join the march against the nationalist Law and Justice party (PiS) led by Jaroslaw Kaczynski, which has been in power for almost eight years. IMAGES AND SOUNDBITES ++ TEXT 33GX988