Boeings original Dreamliner may be old news by now, but a longer variant — the 787-9 — is about to enter passenger service with Air New Zealand. That extended aircraft is also on display for would-be airline customers this week at the Farnborough Airshow, just south of London. With a very light load on board, Boeings able to show off its latest plane with some extreme maneuvers, including steep takeoffs and high-bank turns just feet off the ground.