Flights were temporarily disrupted at four German airports on Thursday after eight climate activists gained access to take-off and landing areas, police and airport officials said. The actions targeted the Berlin-Brandenburg, Stuttgart, Nuremberg and Cologne-Bonn airports. Two activists were present at each site. Flight operations at Cologne/Bonn Airport were interrupted at around 5:45 am (0345 GMT) as two people glued themselves to the pavement on an access road to a runway, said a spokesman for the Federal Police. They were removed and flights resumed, but the action caused delays and the ca…