On December 19, 2016, Islamist attacker Anis Amri drove a stolen truck through a crowd in central Berlin, killing and injuring dozens. Five years later, the background to the attack remains unclear.
It's unclear whether omicron causes milder symptoms than other coronavirus variants though experts still urge the public to get vaccinated. In the UK, at least one death due to the omicron variant has been confirmed.
Researchers think they know why some people developed blood clots after taking the AstraZeneca or Johnson & Johnson jabs. They may also have a solution.
Amid many Christmas market cancellations, the Dortmund Christmas market is welcoming visitors. But some changes and rules may dampen the festive spirit.