The "Troubles" in Northern Ireland killed more than 3,200 people.

In the late 1960s, riots began breaking out during Catholic marches in Northern Ireland. They were marching because they felt they had been treated unfairly. They said they couldn't get jobs because they weren't represented in the government. In 1969, a bigger riot broke out in Belfast, Northern Ireland's capital, and the British sent troops to restore order. This picture was taken at a riot in 1972 where shooting broke out and many innocent people were killed, an incident that came to be known as "Bloody Sunday." The right photo is a building painted by the Loyalists. What do you think their message is?

During the 1960s and 1970s, both Catholics and Protestants in Northern Ireland formed terrorist groups. Suspected Catholic terrorists were arrested and held without a trial. The U.K. even took back direct control of the country. Over the next 29 years, more than 3,200 people were killed, mostly in shootings and bombings. In 1998, the two sides signed a peace agreement called the Good Friday agreement. The aim of that agreement was to create a government of both Catholics and Protestants in Northern Ireland. That goal was finally reached in 2007. Do you think with such a history of anger and violence, peace here will last?