Read the passage. Finding bombs in germany during world war ii, american and british forces dropped millions of tons of bombs on german cities. Nearly ten percent of the bombs never exploded. The war ended in 1945, but more than two thousand tons of unexploded bombs are still found in germany each year. Before any construction project is undertaken, the site must be checked for unexploded bombs. Buried bombs are often discovered. For this reason, germany has a special force of firefighters and police officers, called the kmbd, to defuse and remove these bombs. Even though the war has been over for seven decades, the kmbd is one of the busiest bomb squads on the planet. What is the main idea of the passage?.