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Greece is at boiling point - with police firing tear gas at crowds of angry protesters. Thousands of demonstrators are trying to block access to the Parliament building, where the government is discussing more cutbacks to secure further rescue loans. The deal on the table suggests suffocating austerity measures, such as more taxes and a four-year privatisation programme. If Greeks fail to tighten their belts, they face being cut off from vital European aid worth hundreds of billions of euros. RT's Sara Firth is watching events unfold in Athens.