Northern Ireland celebrates without jubilation this Monday the 25th anniversary of the Good Friday Agreement. Agreement allowed the British province to end a conflict of almost thirty years and caused the death of 3,600 people. In the years following the peace agreement, paramilitary groups were disarmed, the military border dismantled and British troops left. But a quarter of a century later, this is not the time to celebrate, between political deadlock and security concerns, says Fabrice Mourlon of the Sorbonne-Nouvelle University.