Throught the Holocaust, Nazis used deception and propaganda to cover up their crimes. This included deceiving a visiting Red Cross group into thinking that life for Jews in the Theresienstadt camp-ghetto was comfortable. In reality, of the estimated 140,000 people who entered Theresienstadt, over 30,000 died in the camp-ghetto and another 90,000 were deported to death camps.
In response to repeated requests from the International Red Cross regarding the situation of the Jews of Europe, in June 1944 the Nazis invited the Red Cross to visit Theresienstadt. In preparation, the Nazis fixed up the camp and staged a number of performances during the visit.
The Red Cross officials were duped by what they were shown in the camp-ghetto. The Nazis even produced a propaganda film of the camp-ghetto that showed Jewish people playing soccer, drinking in cafes, gardening and living happy lives—all of which was a lie. The above photograph of Jewish children playing was taken the day of the visit. Most of the individuals shown in the film were subsequently deported to death camps like Auschwitz-Birkenau.
Source: Holocaust Encyclopedia. The United States Holocaust Memorial Museum.