US president Barack Obama has paid tribute to the people and leaders of Northern Ireland on the 15th anniversary of the Good Friday Agreement.
He said: "The people of Northern Ireland and their leaders have traveled a great distance over the past fifteen years.
"There is urgent work still to be done – and there will be more tests to come.
"There are still those few who prefer to look backward rather than forward – who prefer to inspire hate rather than hope.
"The many who have brought Northern Ireland this far must keep rejecting their call."