By KARIM JAAFAR / AFP Qatar on Thursday opened a huge expansion of its main international airport as the national carrier’s chief hit back at “rumours” that it could not cope with World Cup passengers. Qatar on Thursday opened a huge expansion of its main international airport as the national carrier’s chief hit back at “rumours” that it could not cope with World Cup passengers. After the multi-billion dollar overhaul, Hamad International Airport will take its capacity from 40 million passengers a year to 58 million, Qatar Airways chief executive Akbar Al Baker told a news conference. The expa…