Over 2,000 tonnes of unexploded bombs are discovered every year, even more than 70 years after World War II. To ensure that the earth is free of any weapons, specialists must certify it before construction companies start digging for a new project. Furthermore, the finding of these bombs is no little matter. In 2013, when a 4,000-pound Blockbuster bomb was found in Dortmund, western Germany, more than 20,000 people were forced to flee their homes. It could destroy an entire city block if it exploded. Since the end of World War II, Germany has enjoyed peace, yet their bomb squad is one of the busiest in the world.