More than 40 thousand people will be evacuated from the German city of Koblenz today, as experts try to defuse a World War II bomb.
The massive British device has been lying at the bottom of the River Rhine for the past 70 years.
It's been uncovered because the water level has dropped due to a lack of rain.
When the attempt to defuse it gets started, everyone within a two kilometre radius will be moved out.
Seven nursing homes, two hospitals and a prison are being evacuated.
