President Barack Obama is greeted by the President of Ireland Mary McAleese and her husband Martin McAleese at the Presidential Residence in Dublin, Ireland, Monday, May 23, 2011. President Barack Obama opens a six-day European tour with a quick dash through Ireland, where he will celebrate his own Irish roots and look to give a boost to a nation grappling with the fallout from its financial collapse. (AP Photo/Carolyn Kaster)