The northwestern German city of Hanover evacuated about 10 percent of its population on Sunday (May 7) to dispose of several unexploded World War II bombs found on a construction site. <br /> <br />Over 50,000 people had to leave their homes for what is believed to be the second-largest bomb disposal operation in postwar Germany, with the previous one taking place on Christmas Day last year in Ausgburg. <br /> <br />Authorities are currently working to remove a total of 13 unexploded bombs, five of which were already located on Saturday (May 6) afternoon in an operation that "kept escalating" over "three weeks," as one resident explained. <br /> <br />The disposal is expected to last until Monday.