Obama has to get up there in Ebrington Square or on the Peace Bridge and deliver one that begins, "Tá me fear Doire!" or some such ringing endorsement of a city that has come together for this year at least and buried the hatchet. A beacon to the world.
Update June 25th. He didn't come!
But at least he has shown some balls in the climate change department.
http://www.guardian.co.uk/world/2013/jun/25/barack-obama-climate-change-strategy