In one of the biggest evacuations in Germany since World War II, 70,000 residents of the city of Frankfurt are to move out of their homes while a bomb is defused. It was found at a construction site in the city center. The bomb was found on the edge of a construction site on Wismarer Strasse. An area of 1.5 kilometers (0.57 square miles) in the Westend district of the city center will have to be cleared on Sunday while it is made safe, a police spokesman said on Wednesday. The operation to defuse it is planned for Sunday.