Every few weeks it seems there's new evidence that flying taxis are more than a flight of fancy. The latest indication? Flying jet taxi designer Lilium raised $90 million from investors, including China's Tencent Holdings, with its promise to haul passengers from downtown Manhattan to JFK Airport in just five minutes. The German startup wants to use the money to build a prototype that can seat five people and fly as fast as 186 mph after its two-seater test model had a successful first flight in April.
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