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A man dressed as Darth Vader at the science fiction fan meeting 'FedCon' in Bonn, Germany, 13 May 2016. Until 16 May, the Star Trek universe is the big topic of the meeting. Discussion forums, readings, autograph sessions and photo calls are part of the programme. PHOTO: CAROLINE SEIDEL/dpa | usage worldwide (KEYSTONE/DPA/Caroline Seidel)