Police in the capital have “thought through every scenario” as they prepare to keep visitors safe during Protestant Reformation celebrations, which include a visit by Barack Obama. Around 140,000 visitors are expected in Berlin for the Church Congress marking 500 years since the start of the Protestant Reformation, which kicks off on Wednesday evening and lasts until Sunday. Former US President Obama will be the star guest in the proceedings, discussing “engaged democracy” with Chancellor Angela Merkel in front of a crowd of 80,000 at the Brandenburg Gate on Thursday. “Unfortunately, the terror threat has been constantly high for a...