BBC News
By Charley Adams
image captionA bomb was detonated in a controlled explosion in Exeter
Hundreds of thousands of bombs were dropped on Britain during World War Two, some of which never exploded, so perhaps it should not be a surprise that they are still being found more than 75 years after the end of the war. But how much do we know about them?
The discovery of an unexploded World War Two bomb in Exeter resulted in a military response, thousands of residents being evacuated from their homes and extensive damage to nearby properties.
After being discovered on an allotment due for development, the 2,200lb (1,000kg) German bomb was blown up on Saturday in a controlled explosion, leaving a crater the size of three double-decker buses.