A blood stained t-shirt hangs inside a makeshift field hospital at Tahrir Square in Cairo February 6, 2011. Demonstrators camped out in Cairo's Tahrir Square, which has become an epicentre for protest, vowed to intensify their battle to oust Egypt's President Hosni Mubarak but the 82-year-old president has said he will stay until September elections because the alternative is chaos. REUTERS/Dylan Martinez (EGYPT - Tags: CIVIL UNREST POLITICS)