Millions of visitors from all over the world, full stadiums and crowds at public viewing events – the men’s European Football Championship from June 14 to July 14 poses enormous challenges for the German security forces. Here, dpa answers the key questions. Q: How many fans are expected in Germany? A: The 10 host stadiums and the fan miles will all be full for matches. “We will see 2.7 million fans in the stadiums and up to 12 million fans in the fan zones in the 10 host cities,” said German Minister of the Interior Nancy Faeser. Of these, 2.5 million visitors are expected in Berlin, where the…