Malia and Sasha in Ireland and Berlin

Michelle Obama, Malia and Sasha walk through the Holocaust Memorial in Berlin Photograph: Reuters

Malia Obama looks up to remains of the Berlin Wall Photograph: Markus Schreiber/AP

Sasha Obama places a flower on the Berlin Wall memorial at Bernauer Street Photograph: Ronny Hartmann/AFP/Getty Images

Sasha and Malia Obama face the Berlin Wall Memorial Photograph: Marcus Brandt/EPA

Auma Obama, Barack Obama's half sister, Michelle Obama, and Sasha listen to Uwe Neumaerker, director of the foundation for the Memorial to the Murdered Jews of Europe Photograph: Adam Berry/Getty Images

Malia Obama touches one of the stele at the Memorial to the Murdered Jews of Europe Photograph: Adam Berry/Getty Images

Michelle Obama embraces Sasha after their visit to the at The Holocaust Memorial in Berlin Photograph: Action Press/Rex Features

Sasha and Malia Obama walk to their car at the Tegel airport in Berlin on day three of their tour Photograph: Markus Schreiber/AP

Local tour guide George McClafferty gestures to Michelle Obama and her daughters at the 6th century monastic site in Glendalough, Ireland Photograph: Fiona Pictures/Demotix/Corbis

Michelle Obama talks with a weary Sasha and Malia at Glendalough Photograph: Artur Widak/AFP/Getty Images

Michelle Obama, Sasha and Malia visit Glendalough with tour guide George McClafferty in the Wicklow Mountains National Park Photograph: Artur Widak/AFP/Getty Images

The wife of Irish prime minister, Fionnuala Kenny, talks to Michelle Obama in the audience during a special performance of Riverdance at Dublin's Gaiety Theatre Photograph: Barry Cronin/EPA

Michelle Obama and her two daughters laugh as they await the start of the Riverdance Performance Photograph: Artur Widak/AFP/Getty Images

Michelle Obama, Sasha and Malia tour the Old Library Building at Trinity College in Dublin Photograph: Artur Widak/AFP/Getty Images

Michelle Obama, Sasha and Malia look through archives documenting the Obamas' Irish ancestry Photograph: Pablo Martinez Monsivais/AP

Michelle Obama, Sasha and Malia are escorted by Patrick Prendergast, President/Provost of Trinity College Photograph: Pablo Martinez Monsivais/AP

Sasha and Malia Obama whisper as Barack Obama is greeted upon their arrival at Air Force One in Belfast Photograph: Kevin Lamarque/Reuters

Barack Obama and Michelle Obama give an encouraging embrace to their daughters as the walk to Marine One upon their arrival in Belfast Photograph: Kevin Lamarque/Reuters

Sasha and Malia Obama wear colourful shoes in the rain upon their arrival on Air Force One in Belfast Photograph: Kevin Lamarque/Reuters

Barack Obama, Michelle Obama and their daughter Malia walk to Marine One as they depart the White House to travel to Northern Ireland to take part in the G8 Summit Photograph: Getty Images