Irish President Mary McAleese (2ndL) walks with US President Barack Obama (L) in the Presidential Residence, in Dublin, Ireland, on May 23, 2011. US President Barack Obama landed in Ireland on May 23, 2011 for a visit celebrating his ancestral roots, kicking off a four-nation European tour. AFP PHOTO/ POOL/ MAXWELL’S (Photo credit should read -/AFP/Getty Images)