Following a knife attack in the western German city of Siegen, the state government’s interior minister is considering increased security measures at events, which could result in mandatory bag checks at large festivals. “I am currently examining whether it is legally possible … to conduct bag checks at large festivals,” North Rhine Westphalia’s (NRW) Interior Minister Herbert Reul said at a festival in the city in the southern part of the state, Germany’s most populous. Reul said he did not want bag checks at every location, summer fair, or school festival, but there could be “a middle grou…