Ireland's Prime Minister Bertie Ahern waves as he leaves his Fianna Fail party constituency headquarters in Dublin in this May 26, 2007 file photograph. Ahern will step down as Ireland's prime minister on May 6, bowing to mounting pressure for him to go early following a string of embarrassing appearances in the witness stand at an anti-corruption tribunal. REUTERS/Luke MacGregor/Files (IRELAND) | Foto: Reuters