World War II bomb disposal in Europe
The Royal Air Force and United States Army Air Forces dropped 2.7 million tonnes of bombs on Europe during World War II. In the United Kingdom, the German Luftwaffe dropped more than 12,000 tonnes of bombs on London alone. In 2018, the British Ministry of Defence reported that 450 World War II bombs were made safe or defused since 2010 by disposal teams.
Source: Wikipedia — World War II bomb disposal in Europe (CC BY-SA 4.0)