By Elana Ringler YAVNE, Israel (Reuters) – After 15 years of development, an Israeli tech firm is optimistic it will finally get its 1,500 kg (1.5 tonne) passenger carrying drone off the ground and into the market by 2020. The Cormorant, billed as a flying car, is capable of transporting 500kg (around half a tonne) of weight and traveling at 185 km (115 miles) per hour. "Just imagine a dirty bomb in a city and chemical substance of something else and this vehicle can come in robotically, remotely piloted, come into a street and decontaminate an area," Urban Aeronautics founder and CEO Rafi Yoeli told Reuters.