Kurt Campbell, a former top US diplomat who until recently dealt with Burma, has started a consulting firm that joined a bid for a huge contract to overhaul Rangoon International Airport, Foreign Policy magazine reports. Campbell, the former deputy assistant secretary of state for East Asian and Pacific Affairs, started a firm called the Asia Group with his former deputy assistant secretary Nirav Patel. On Monday, it joined an American consortium of firms that made a bid to upgrade Rangoon’s decades-old airport. Campbell will lead a delegation representing the consortium, which includes Boeing Professional Services, Burns & McDonnell Engineering and Fentress Architects, on a visit to Burma next month.