PARIS :There are advantages of new entrants joining an Italian-British-Japanese next-generation fighter jet programme, but it's a decision for the governments involved, the head of Italian aerospace and defence group Leonardo said on Tuesday. Speaking at the Paris Airshow, Roberto Cingolani said more partners could help boost the technology of the Global Combat Air Programme. He also said that Saudi Arabia joining the programme - which has long been mooted - would open up a big market with