Protesters began a sit-in in Cairo’s Tahrir Square on Wednesday, to commemorate the one-year anniversary of the Egyptian revolution that toppled former President Hosni Mubarak.

The Al Jazeera network reported that the military, which was handed power as the president stepped down on February 11, has planned mass celebrations with a naval parade in Alexandria, air shows in Cairo and fireworks displays around the country. Activists, however, say the revolution has been hijacked by Hussein Tantawi, who heads the military council.