What’s behind the recent violence in Northern Ireland?

For over a week, riots have marred the streets across five cities and towns in Northern Ireland. Cars and a bus have been hijacked and burned, young people have thrown petrol bombs at police, and at least 74 officers have been injured.For over a week, riots have marred the streets across five cities and towns in Northern Ireland. Cars and a bus have been hijacked and burned, young people have thrown petrol bombs at police, and at least 74 officers have been injured.