German Chancellor Olaf Scholz has defended planned border controls during the European Football Championship, after the country’s interior minister announced the measures earlier on Tuesday. “This is a proven set of instruments that we have in Europe and that we use here and that serves security. I think everyone understands that,” Scholz said on Tuesday during a visit to Slovenia. “We will do everything necessary to keep citizens safe.” Even before the terrorist attack on a concert hall near Moscow last week, assessing the security situation had been a “top priority” and many security precaut…