Confronting a violent minority: We must turn outrage into real action

One of the consequences of the murder of Lyra McKee, who will be buried today, in Derry last week is the sobering reminder that an enduring evil festers barely beneath the surface of this society.

Her death, at just 29, was a jolt that made it impossible to complacent, to be ambiguous about the threat posed by a tiny minority of physical force fantasists and thugs.