Is making peace hard? A quarter of a century has passed since militants agreed the Good Friday Agreement to bring peace to Northern Ireland. But did the conflict ever really end?
Ireland torn by drugs, debt and kneecappings
Watching: Murals have become symbols of Northern Ireland, marking out republican and loyalist areas. Glossary
Belfast - The capital of Northern Ireland.
Good Friday Agreement - The treaty that ended the Troubles, a decades-long conflict between Catholics and Protestants in Northern Ireland, which also saw fighting between the British government and Irish republicans. One of its central tenets is an open border between Northern Ireland and the Republic of Ireland.
Republicans - People who believe a country should not have a king or queen, or in the US, members of the Republican party.
Paramilitary - An unofficial group organised like a military force.
IRA - The Irish Republican Army, or IRA, was an unofficial military organization made up of people who wanted an end to British rule in Northern Ireland.
New IRA - The New Irish Republican Army, an Irish republican paramilitary group. Police are investigating whether it is behind the shooting of a police detective in early 2023.
Israel - A country in the Middle East, and the only Jewish nation in the modern period. It is seen by Jews, Christians and Muslims as the Holy Land.
Palestinian - Palestine is an area of the eastern Mediterranean region, including the West Bank, Gaza Strip and parts of modern Israel. It has been fought over by Arab and Jewish national movements for many years.
Civil war - A war between people from the same country.
PR - Public Relations — the practice of managing how others see a brand or person.
Ceasefire - An end to fighting — often temporary.