The discovery of an unexploded aerial bomb from World War II in Cologne forced the evacuation of broadcaster RTL’s headquarters on Wednesday, but programming continued without disruption. Discovery of unexploded bombs is common in Cologne and other German cities, which were heavily bombed by Allied air forces during the war. Specially trained crews were dispatched to defuse or safely detonate the bomb. An RTL spokeswoman said the network would continue broadcasting its full programme from outside the evacuation zone, and that RTL’s studio in Berlin would temporarily take over direction. Presen…