Safety in pedestrian zones across Germany was tightened after a militant Islamist drove a hijacked truck to a Christmas market in Berlin in 2016, killing 12 people and injuring dozen. Four days later, he was shot dead by Italian police.

Safety in pedestrian zones across Germany was tightened after a militant Islamist drove a hijacked truck to a Christmas market in Berlin in 2016, killing 12 people and injuring dozen. Four days later, he was shot dead by Italian police.