Two artists who secretly copied one of Germany's most prized antiquities then released it around the world for free, have revived an international debate about cultural theft and repatriation. In 1912, German archeologists in Egypt found the 3000-year-old bust of Queen Nefertiti, and it's become one of Berlin's biggest tourist attractions. Nora Al-Badri and Jan Mikolai Nelles used a scanning device hidden under a scarf when they went to Neues Museum in Berlin in October. They first used the data to create 3-D printed copies of the bust. Then they worked with hackers who released the data to the world, for free.