Mr Obama said "every citizen and every political party" needed to work together in service of "true and lasting peace and prosperity".

BBC: Barack Obama: 'Work still to be done in Northern Ireland'

Let us seize the opportunity to forge ahead, hand in hand, and work together to enhance cooperation as partners, and let us work with all other countries to build a harmonious world of lasting peace and common prosperity.

WHITEHOUSE: China State Visit Arrival Ceremony

To you and to the people of Ireland, America is grateful for our shared past, hopeful for our common future, and I assure you we will be a faithful partner in the work of progress and prosperity, and a just a lasting peace.

WHITEHOUSE: Friends of Ireland Luncheon

"The Iranian nation is prepared to enter into dialogue and negotiation in order to lay the ground for lasting peace and regionally inspired and generated stability for the region and beyond and the continued progress and prosperity of the nations of the region and the world, " one passage states.

CNN: Iran nuclear plans 'revealed' on Web site