Egypt's Christians marked the one-year anniversary of the "Maspero massacre" this week by demanding justice for those killed.
On Oct. 9, 2011, the Egyptian army attacked a peaceful gathering of Christian demonstrators in Cairo.
Altogether 27 Christians died in attack. Many of them were crushed when soldiers drove their vehicles directly into the crowds.
On Tuesday, thousands of demonstrators paraded through the streets, demanding retribution for the army leaders they believe are responsible for slaughter.
One of the protestors, 32-year old Sama Kamal, expressed doubt the Egypt's President Mohammed Morsi would bring the generals to trial.
"We are just making our loud voice heard," she said. "We are letting him know we remember our martyrs and we will make sure they get retribution."
A military court convicted three soldiers of manslaughter. Human rights attorneys say they should have been tried in a civilian court.
"A whole year later, the real perpetrators who gave the orders to commit these crimes haven't been brought to justice," the Egyptian Initiative for Personal Rights said.