Obama's half-sister makes rare public appearance as she joins Michelle and her daughters in Germany.

Mrs Obama and her daughters were joined on the trip by Auma, the president's half-sister, who studied in Germany and lives in Kenya. The Obamas are in Germany for a two-day visit and while the President meets with leader Angela Merkel, his wife and daughters visited the Memorial to the Murdered Jews of Europe, a solemn reminder of the millions of lives lost during the Holocaust.