BERLIN (Reuters) - Climate activists sought to disrupt the long-delayed opening of Berlin’s new airport on Saturday, one gluing himself to the door of a plane, others scaling the terminal to hang placards and many crowding the building dressed as penguins. Slideshow ( 5 images )The opening of the Berlin-Brandenburg Willy Brandt airport - to be known by its BER code - comes as the global aviation industry struggles with a dearth of travellers due to the coronavirus pandemic. Construction on the new airport began in 2006 and it was originally due to open in 2011. But construction problems and technical issues saw the date pushed back repeatedly, a major embarrassment that dented Germany’s reputation for efficiency. The delays left Berlin relying on two outdated and crowded Cold War-era airports: Tegel, which served the west of the city, and Schoenefeld, which was once Communist East Berlin’s airport and which has been integrated into the new facility. “The time for jokes about the BER must be over now,” said Transport Minister Andreas Scheuer, adding that the country needed to start a new “economic miracle” like the one seen in Germany after World War Two to recover from the pandemic.