Sinn Fein President Gerry Adams speaks on the phone in St Stephens Green, while campaigning for a yes vote in Ireland' same-sex marriage referendum, in Dublin, Ireland May 20, 2015. Irish Prime Minister Enda Kenny said on Sunday that Ireland must seize its opportunity to become the first country to approve same-sex marriage in a popular vote when it holds a referendum on the issue on Friday.REUTERS/Cathal McNaughton