(Al Jazeera English: 1029 PST, April 1, 2011) Thousands of people have gathered in Cairo's Tahrir Square. Pro-reform activists say they fear the country's revolution is under threat. They are calling for the country's military government to punish the remaining members of former President Hosni Mubarak's regime. Al Jazeera's Zeina Khodr reports from Cairo, Egypt.